45W LED Grow Light, UNIFUN New Light Plant Bulbs Plant Growing Bulb for Hydroponic Aquatic Indoor Plants

Last Updated On Monday April 13th, 2020
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currently average price

Up 18%

Updated April 13, 2020
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Apr 19

for -80 days

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DatePrice ActionChange %Price Level
14 Oct, 2019On Sale17.66%average
9 Oct, 2019On Sale-15.01%lowest
18 Sep, 2019On Sale17.66%average
16 Sep, 2019On Sale-15.01%lowest
25 Apr, 2019Price Drop-8.34%average
Update on 13 Apr, 2020

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Best Alternative Recommendations

We also found 2 products that redditors have recommended that are the best alternative to this product or are related accessories.

Recommended in IndoorGarden

45W LED Grow Light, UNIFUN New Light Plant Bulbs Plant Growing Bulb for Hydroponic Aquatic Indoor Plants

Product Details

  • Amazon.com Sold on
  • B01F53LP46 Amazon ASIN
  • UNIFUN Brand
  • Light-45W Model Number
  • UNIFUN Manufacturer
  • Categories

    Patio, Lawn & Garden, Gardening & Lawn Care, Indoor Gardening & Hydroponics, Growing Lamps

Reddit Reviews and Recommendations

  • 32 Reviews
  • Oct. 11, 2019 Last Review Date
  • Jan. 3, 2017 First Seen Review Date
  • 14 Reviewed on Subreddits

    gardening (9)
    succulents (6)
    microgrowery (4)
    HotPeppers (3)
    AskPhysics (1)
    Bonsai (1)
    HuntsvilleAlabama (1)
    IndoorGarden (1)
    Romania (1)
    SpaceBuckets (1)
    and 4 more...

Discussion and Reviews on Reddit

Overwinter setup! (KS) [R]

6 months agoTheBozo posted submission on succulents.
Oct. 11, 2019
6 months agoTheBozo posted comment on succulents.
Oct. 11, 2019

45W LED Grow Light, UNIFUN New Light Plant Bulbs Plant Growing Bulb for Hydroponic Aquatic Indoor Plants https://www.amazon.com/dp/B01F53LP46/ref=cm_sw_r_cp_apa_i_cptODbQHDE0JB

xGraptoveria "Topsy Debbie" aka "Cupid" & "Lavender/Lilac Spoons" 6 months before and after! [R]

7 months, 3 weeks agohibird18 posted submission on succulents.
Aug. 19, 2019
7 months, 3 weeks agohibird18 posted comment on succulents.
Aug. 20, 2019

45W LED Grow Light, UNIFUN New Light Plant Bulbs Plant Growing Bulb for Hydroponic Aquatic Indoor Plants https://www.amazon.com/dp/B01F53LP46/ref=cm_sw_r_cp_apa_i_9CbxDbE6MEX57 This is the one I use cuz I'm a cheapskate. Full spectrum is a lot better for actual viewing/ photography tho. I think it's about 6 inches from the plants and on for about 12-14 hours. I would check out the overwinter megathread under the about tab for r/succulents for grow light into tho. They are way more helpful :)

Seedlings not anchoring - help! [R]

1 year agoJheronimus4 posted submission on gardening.
March 22, 2019

Howdy. Some of my seedling look like they’re pushing themselves out of their starting medium. This is mostly a problem with the onions. They’re horizontal with a bunch of roots showing sideways. Same problem with a few tomatoes and cabbage family, but not as much. This is my first time doing an indoor seed starting program. Using soil blocks with heat mats and grow lights about 4-5” above top of blocks. Watering multiple times a day to maintain a surface-moist look to the blocks on top while also adding water to the trays every few days so they’re staying moist from below.

My thoughts: Maybe I’m watering too much from above, and the plants need to learn to get water from below and thereby deepen their roots. I dont know, my guess.

One more question while I’m at it: These guys were all sown about a month ago. How big should they be? Some onion are maybe 2.5”, some broccoli and peppers about 3/4”. Those are the biggest ones so far, but not many true leaves have popped out yet.

1 year agoJheronimus4 posted comment on gardening.
March 22, 2019

Hm, yeah some of the onions do have a very slight white bulge at the base. Maybe that's happening. Oops. Thanks the tip.

I got some 3-3-0.3 fish emulsion today and mixed it to about 1tsp:32oz (approximately the packaging recommendation of 1tbsp:gallon for house plants) and sprayed it on them. I'll water just in the morning from now on, and every 3rd-4th day watering with the fertilizer dillution.

While we're at it, any thoughts on these lights? Again, no experience doing seeds indoors but I'm not looking to have a big indoor growing operation. Just trying grow some different varieties than I can buy as starts. So I bought something reasonably priced with halfway decent reviews. The plants appear to be healthy, not real leggy or anything. Just small and slow to get the true leaves. Maybe I could supplement with some window sill time, but I'm wary of changing climate that much and also I have a 2 year that would just demolish everything.

Seedlings not anchoring - help! [R]

1 year agoJheronimus4 posted submission on gardening.
March 22, 2019

Howdy. Some of my seedling look like they’re pushing themselves out of their starting medium. This is mostly a problem with the onions. They’re horizontal with a bunch of roots showing sideways. Same problem with a few tomatoes and cabbage family, but not as much. This is my first time doing an indoor seed starting program. Using soil blocks with heat mats and grow lights about 4-5” above top of blocks. Watering multiple times a day to maintain a surface-moist look to the blocks on top while also adding water to the trays every few days so they’re staying moist from below.

My thoughts: Maybe I’m watering too much from above, and the plants need to learn to get water from below and thereby deepen their roots. I dont know, my guess.

One more question while I’m at it: These guys were all sown about a month ago. How big should they be? Some onion are maybe 2.5”, some broccoli and peppers about 3/4”. Those are the biggest ones so far, but not many true leaves have popped out yet.

1 year agoJheronimus4 posted comment on gardening.
March 22, 2019

I'm using these. Is it any good?

Yeah, I agree the lights are a bit too far away but I don't really have a way to adjust it easily. I figured sense a lot of people start them in windows sills, this was at least better than that.

I've been worried about watering too much, but what do I do when the soil block surface is looking dry? Just let it be dry and assume there's enough internal moisture for the plant?

Also, if you take a look at my reply to u/rocktulip I mentioned a fertilizing plan. Does this sound ok to you? Planning on mixing half strength and applying via a few squirts of a spray bottle every, say, 3 days until the plants start getting bigger?

Plant shelfie [R]

1 year, 2 months agoTheBozo posted submission on succulents.
Jan. 31, 2019
1 year, 2 months agoTheBozo posted comment on succulents.
Jan. 31, 2019

45W LED Grow Light, UNIFUN New Light Plant Bulbs Plant Growing Bulb for Hydroponic Aquatic Indoor Plants https://www.amazon.com/dp/B01F53LP46/ref=cm_sw_r_cp_apa_i_DzZuCbXPNDDTD

1 year, 4 months agoburtnayd posted submission on succulents.
Dec. 2, 2018

Trade Thread | Monthly Contest: Haworthias!

Hi and welcome to the r/succulents Weekly Questions Thread!

Do you:

  • Have questions which don't feel worthy of an entire post?
  • Wanna postulate what would happen if you did ____?
  • Need input from more experienced people?

Post away! If you have questions which have gone unanswered in one of the previous threads, post 'em again!

New to succulent care?

Be sure to take a look at the FAQ, Beginner Basics wiki, or try using the search bar. Take a look at the Posting Guidelines before submitting, too.

Got a grow light question?

Browse setups and see if your question has already been answered in the Overwinter Megathread.

Have a plant health question? Help us help you by using the below guidelines:

Information, information, information! Try to keep your answers to the below concise and easy to read (bullet points are easier on the eyes than paragraphs).

  • Description: A well lit photo and/or detailed description of the issue.
  • Drainage: Is the plant in a container? What kind? Does it have a drainage hole?
  • Potting medium: What kind of mix is the plant potted in?
  • Water: How often do you water and how much?
  • Sunlight: Where is the plant situated and what is its exposure to sun like? Direct/indirect sunlight? Hours per day?
  • History: How long have you had the plant, when did this start, and have any changes been made recently? (E.g., repotting, location change.)
  • If concerned about rot: Are any sections of the stem, roots, or leafs mushy to the point where there is no structural integrity? Any unusual odor or changes in color?
1 year, 4 months agoburtnayd posted comment on succulents.
Dec. 5, 2018

If daylight is scarce I’d look into getting a grow light. I use this for my props right now set with a timer. Since they do go dormant in the winter I’m not sure if props can be tricked with more light or not, but I’m trying!

LED vs dedicated growing lights? [R]

1 year, 6 months agoreefshadow posted submission on IndoorGarden.
Sept. 29, 2018

I have a few plants that can't handle the local winter so I'll be moving them inside soon. I keep hearing that LED lights are full spectrum and are find for plants, but I'm wondering how true that is. Can I just get a few LEDs shining on my plants, or should I really get those fancy odd-coloured "grow lights" that I see on Amazon instead. Do they actually work better? Thanks for any insight.

1 year, 6 months agoreefshadow posted comment on IndoorGarden.
Sept. 30, 2018

I have this one


And this one


The LED light is a much more attractive spectrum, the HPS is quite yellow. No way the LED is actually producing 1800 watts but i suspected that going in. Growing banana, avocado, jackfruit, mandevilla, succulents, lemon, pitaya and some others in a dedicated room. Room had been set up for over 2 weeks, new growth on everything. 18 on, all lights on single timer. You can buy the ratcheting carabiner cords for very cheap. One caveat about any light that is going to actually produce healthy growth is that if it is above your eye level you will not like it. Mine is not set up for aesthetics but to keep my plants thriving through the winter in zone 6. Last year I really struggled along with shitty cheap lights and lost a few plants. We have some huge windows but deep eaves and they just aren't adequate. Entering the plant room is like walking into a blast furnace for the eyes because my plants are so tall.

There are some really shit lights so make sure you're reading the reviews. If people are growing weed with them you're generally good to go. Last year I bought a cheap purple panel led and some spot lights and they were shit. They are also hideously ugly, they make the foliage appear brown. Edit- this is the one I bought last year. I would not buy any this weak again


They may be good for starting seedlings or for lower light houseplants but to keep outdoor full sun plants thriving indoors they were total failure.

8 weeks of flowering . Maybe a couple more needed? [R]

1 year, 7 months agoxCurb posted submission on cannabiscultivation.
Aug. 27, 2018
1 year, 7 months agoxCurb posted comment on cannabiscultivation.
Sept. 1, 2018


Think that’s the light that’s hanging in the middle, then 4 9inch reflector clamps in the corners with “100w Led Bulbs” - GreatValue brand- that only pull 14w each from the wall.

So 56+45 =101? That was my basic workout of it in the beginning, or something close to it. Think I have wrong spectrums for flowering with the reflectors, no nutrients to boost them (do have foxfarm coming), and I’m aware middle light isn’t strong enough for several plants, but it’s doing pretty good on the one far as I can tell, there is a second in the room it’s just further behind/bigger/different strain/not getting enough spectrum from reflect lights so not flowering normally.

What a world to live in :-)

Question: Can something grow under an LED strip instead of sunlight? [R]

1 year, 12 months agoranoutofbacon posted submission on gardening.
April 14, 2018

I am growing a plant in a solo cup in my apartment. I want to use the LED strip that provides light for my room to grow the plant further instead of sunlight. Is this possible if I just had the plant right below the strip? It seems like it is from what I've gathered, but I'm not sure.

Sorry for the vague description of the situation, I can answer any questions if it helps answer mine.

Here is my exact LED strip (highly recommend btw): https://www.amazon.com/gp/product/B0040FJ27S/ref=ox_sc_act_title_2?smid=A325274ZEF9XYZ&psc=1

Edit: Should be noted that my plant would be just sitting right under a portion of the existing LED strip that is attached to my wall/ceiling , I'm not going to rearrange the strip for this just wanted to know if it can work

1 year, 12 months agoranoutofbacon posted comment on gardening.
April 14, 2018

ditch that strip and go with these

Spring Gardening in North Alabama Week #1 [R]

2 years, 1 month agoinfilitratecky posted submission on HuntsvilleAlabama.
March 4, 2018

Let's try something new. Each week during spring I'll start a thread with my gardening notes. All fellow gardeners chime in.

Gardening: Today, I started with cool weather plants. Lettuce, Spinach, Carrots. This year, all my cool weather plants are in raised beds, new for me. I may do purple potatoes spuds later this week.

Flower Beds: General picking up of weeds and leaves. I think it is too early to plant anything. I am waiting on good sale at orange/blue for mulch, usually goes on sale around April 1st.

Lawn: I may try to mow my zoysia lawn on the lowest setting this week. I am not much of a yard person, so I won't spray for weeds.

2 years, 1 month agoinfilitratecky posted comment on HuntsvilleAlabama.
March 4, 2018

Started germinating seeds Feb. 24th using two 45W LED grow lights and some plastic pots. I encapsulated half of a Costco garage storage shelf and mounted the lights to a 1x6 for easy height adjustment. The plants sit on two seedling heat mats and lights run 16 hours/day. Here is a list and picture of Group C at one week.

[Help] My tree has all this white crap on it, i think its mold. What do [R]

2 years, 1 month agoCaptnIgnit posted submission on Bonsai.
March 1, 2018
2 years, 1 month agoCaptnIgnit posted comment on Bonsai.
March 2, 2018

South facing windows don't provide even light, you need to rotate the tree to keep them from leaning too heavily. This means they don't get as much light as if they were outside. This means health will be compromised over time.

Grow lights of sufficient power are not ridiculously cheap. I have this one and this one. The first I use for seedlings as it isn't powerful enough to provide enough light to developed tree. The second I use seasonally if it gets too cold as I don't have room for a greenhouse.

You may be able to find cheaper used equipment, especially older stuff like CCFLs and MH/HPS. But those have a whole host of problems from heat management to spectrum and intensity issues.

Depending on where you keep the light, you may also need to worry about temperature and humidity. I use a small grow tent to help control both temp and humidity, but this also adds additional expense.

All this, just to mimic conditions that are generally readily available outside.

> Never said it was just as viable either but to deny like everyone preaches in this sub, it is what then?

You originally said

> you will come across many people who have grown years or decades indoor. It's an elitist opinion that it can only be outdoor.

This presents a view of indoor and outdoor as a choice of little consequence. aka they are equally viable.

> Moreover, stop referencing horticulturists unless you can quote one chiming in on the topic of bonsai, else that's just talk.

fine, here's a bonsai professional with a degree in horticulture:

> So there are clients that have found situations where they’re capable of cultivating these indoors, but it’s an extremely challenging thing to do. We also end up potentially designing the space in which their trees are held.

Help identifying problems with plants [R]

2 years, 1 month agoThe_Real_Bill_Murray posted submission on HotPeppers.
Feb. 14, 2018
2 years, 1 month agoThe_Real_Bill_Murray posted comment on HotPeppers.
Feb. 14, 2018

It looks to be only affecting my jalapeno, cayenne and crosses of the two.

The light was probably 1-2 feet away, maybe they got burned?

I have noticed that the soil is taking forever to dry. I'm suspecting my light source is an issue?

I have the light on from 6am to 10pm, fan running, 2 of 3 flaps open. Room temp is 68F, no idea of the inside temp of the tent.

Using this LED light and this fan

A week ago I shaved the top of the soil, it was dark, hard and just not drying out. That's when I added a fan to the equation.

Am I right in thinking it's the light? I am thinking of grabbing this one

What's the best LED grow light for seed starting and indoor gardening that is affordable for the home gardener? [R]

2 years, 2 months agoalxro99 posted submission on gardening.
Jan. 23, 2018

I have 1 old T1 grow light, but it's really only effective under the narrow strip where the light is. I want to upgrade to one that a whole flat will fit under, but I don't know what to choose.

I need a light that is inexpensive to run and also on the cheaper side. I'm hoping to find something under $200. So what lights are you gardeners using that works really well and doesn't run your electrical bill up to $400 a month?

2 years, 2 months agoalxro99 posted comment on gardening.
Jan. 23, 2018

I hope I don't get roasted here for buying something stupid (new at indoor growing), but I have two of these currently in my basement. I have some lettuce that is growing currently as I was bored over the winter in Boston but I intend to use it to start some seeds soon. I can post a picture of the set up later when I get home. Seems the old owner had some flourescents in the place where I have my light hanging. I do also generate solar energy, so I didn't care much about power and know that I am growing very expensive lettuce right now.


Two weeks progress report my 2nd grow season. [R]

2 years, 3 months agoThe_Real_Bill_Murray posted submission on HotPeppers.
Jan. 12, 2018
2 years, 3 months agoThe_Real_Bill_Murray posted comment on HotPeppers.
Jan. 12, 2018

Indoors until last day of frost.

This is the light.

Is it possible to produce an altered reading on a spectograph from an LED light source somehow? [R]

2 years, 3 months agoJan. 5, 2018


2 years, 3 months agozebediah49 posted comment on AskPhysics.
Jan. 5, 2018

To add some further detail: there are approximately three ways of adjusting color:

  • Start from a broadband source, and filter out what you don't want. This is very inefficient, and defeats the point of what you want here.
  • Use a phosphor to downconvert. This will absorb light at one range of frequencies, and re-emit it at lower frequencies. This is likely how your LED already works -- I would expect the peak in blue is its primary output wavelength, some of which is absorbed and re-emitted across the green and red specturm to make it overall "white". This will be difficult and expensive to do unless you're doing it at manufacturing scale.
  • Use a nonlinear crystal. Under the right conditions, in very specific materials, you can turn one photon into two photons of twice the wavelength (or in some cases, three of a third), or the opposite. This is reasonably efficient, but usually quite expensive. a 512nm laser produced by frequency-doubling a 1064nm Nd-YAG is a pretty common use. In any case, this method is also basically useless for your application.

I would say either use the right lights, use more lights, or DIY it by combining light sources. You could, for example, use those LEDs as primary lighting, but augment them with cheap red (or possibly a bit of blue) LED strips. Thus you can adjust your overall light based on the proportions of the individual components you're using.

E: Really though, you can get horticultural systems pretty cheap -- For example, here's a 45W red/blue system for $30.

LED light bulb safety guide and FAQ [R]

2 years, 4 months agoGlintingGonzo posted submission on SpaceBuckets.
Dec. 13, 2017

LED light bulb safety guide

last update: 13NOV17 initial draft


This will be archived in SAG’s Plant Light Guide when completed. Picture credits not listed yet.


Here is a first draft and I would appreciate any mistakes be pointed out and questions asked for clarification if needed. Any tips, making expanded points, discussing first hand experience, etc would be greatly appreciated!

“--” means jotting down notes to clarify later

I recommend not removing the cover of an LED light bulb at this point (modified). Towards the end is how to make a good reflector with the cover left on that can in some cases outperform an LED bulb with the cover removed. If you do use a clear cover.

White lighting theory is much more in depth and will be covered in another article. Time will be spent on explaining the unit of electronvolt and how it applies to white LEDs and their phosphor, and how it applies to photosynthesis. It will be much easier to understand than that wiki link. 1240 / wavelength of photon in nm will give the eV. It will help a lot by looking at systems from a different viewpoint. Explaining all of the chlorophyll/photosynthesis by wavelength charts will be done.

I need to show off pics of what not to do as well as what to do safely.


Not safety related but to clarify equivalent wattage which is an industry standard, “40 watts equivalent” is 450 lumens, “60 watts equivalent” is 800 lumens, and 100 ‘watts equivalent” is 1500/1600 lumens. This may vary slightly and is independent of true wattage. A 40 watt equivalent bulb was nine watts true five years ago is about five watts true today.

This is lumens equivalent to an incandescent light bulb and will remain an industry standard for a long time since it helps the consumer choose a bulb appropriate for them regardless of the changing true wattage. This can help you determine lumens per watt (luminous efficacy which can be converted to electrical efficiency- this will be talked about in a future article).


As a quick note I’d like to very highly discourage beginner use of direct AC COB LEDs. You will end up seeing stuff like this (posted “fair use”) with exposed line voltage on the COBs and an exposed power supply (you can epoxy encapsulate the line side of the power supply. Five minute epoxy can cure for about a minute or two then cover the terminal with the goopy epoxy. Several separate layers should be used in 5-10 minute intervals and electrical tape applied. It will be ready in five hours of curing.)

The above heat sink is properly grounded and mechanically it is very nice and neat. But the design needs to be toddler proof- you should not physically be able to get an electrical shock off of your lighting setup. And you should not be showing inherently dangerous designs off. Asking if something that you are doing is safe should be encouraged.

The problem is that in the comment section people may be going “wow, I can get a 50 watt COB for only $2!! Where did you get it”. (I just did a quick eBay check. Let me know if I’m wrong). Well, yeah you can. But do you know how to use a soldering iron and understand what a cold solder joint is, for example? Do you understand how to properly protect every thing so no electrical shock is normally possible? Do you understand soldering and how it relates to LEDs on a heat sink? Learning soldering by doing line voltage work is such a bad idea. It’s even worse if you use a cheap five dollar pencil soldering iron- you want the soldering iron to be temperature controlled.

I’d rather go cheaper on a multimeter than a soldering iron. You can get a good enough multimeter for around $25 but the $25 temperature controlled soldering irons I’ve seen look awful.

Another time someone made two AC COB lights with some sort of problem that the person was reading 80 volts between the two separated heat sinks. The person showed a flippant disregard for electrical safety when pointed out how dangerous this was and one of the very few times that a post has been removed from /r/spacebuckets.

So before people get too excited about these "suicide lights" I want you to ask yourself: “how much is my life worth?” and then spend more money on a safer option. You must know what you are doing and have some experience before working with these type of COBs

AC COBs can be used safely with proper grounding and ingress protection. As a warning, Big Clive on YouTube (you should check out this channel if you have an interest in LED lighting) has found instances of cheap COB work lights without grounding and cold solder joints. I would never use a cheap eBay type line voltage LED light without opening it up so I can inspect it. A "10 watt" light turned out to have 3 watts on the LED.


I said in the past that 15-20 LEDs total would make a bulb with the cover removed still safe. I was wrong to make that statement. Five years ago this could have been true like [can be seen in this bulb]() that also has a plastic cover over the LEDs themselves.

But removing the frosted cover can significantly increase the efficiency of LED light bulbs in terms of the light directly hitting the plant without a reflection. On top of taking about a 10% light absorption hit from the plastic itself, removing the cover narrows the beam angle from as wide as 300 degrees to typically 120 degrees. That means a lot more light on the plants. Whether you remove the cover or not, the LED light bulbs should be pointing downwards on to the plants unlike CFLs necessarily.

White LED chips need 3-3.3 volts give or take a little. The LEDs in the bulb may have 1-6 LED chips per LED. These chips are wired in series for a higher voltage and called “multichip LEDs”. Higher voltage, lower current using more chips can make an LED light more efficient due to lower Auger recombination.

See below for what I believe is safer and more efficient work around with an unmodified LED bulb. Also below are safer ideas if removing the frosted cover.


--show off bulb with exposed line voltage if the cover is removed

There are four basic types of power supplies used in LED bulbs. None of them are isolated from ground so there are conditions where removing the cover of an LED bulb is a very bad and dangerous idea. These power supplies mostly run on the peak voltage which is about 170 volts DC for 120 volt AC and about 390 volts DC for 230 volts AC countries.

--RESISTIVE- --discuss the Seoul Semiconductor about AC COB. Discuss cheap LED night lights

--Seould Semiconductor, a reputable company, used to(?) sell line voltage LEDs that only had two resistors and two stings of LEDs in reverse-parallel

--some LED night lights just use two resistors hand soldered to a white LED. The resistors were ¼ watt 2200 ohm. This design will have noticeable flickering. Others used a bridge rectifier and a resistor with no noticeable flickering since the bridge rectifier acts as a frequency doubler so 50Hz AC becomes 100Hz full wave rectified.


https://en.wikipedia.org/wiki/Capacitive_power_supply (everything right of “R3” would be replaced with a string of LEDs in series most of the time). The capacitor acts as current control/effective voltage through capacitive reactance.

--Uses a capacitor on the line side to limit current and effective voltage


--Uses a linear voltage (or voltage regulator wire up for constant current). The voltage drop across the LEDs in series needs to be close to the peak line voltage for efficient reasons.


Uses as swithing power supply to regulate the current. Can interfere with lab gear if close by. The peak line voltage is being pulse width modulator to a lower voltage with the pulse width determined by a sense resistor and an inductor in series with the LEDs for phase shifting. There is still no line isolation with these cheap switching regulators.

Other types of LED power supplies (Mean Well and the like) should be isolated but the cheaper ones should be checked first.


--LED bulbs can be quite flexible in how one uses them and allows quite a bit of creativity. With many LED light bulbs it is possible to remove the metal core circuit board. Examples are like this for bucket side lighting (the aluminum plate in front has a remote mounted LED light bulb array and this is the front). Do not remove the LEDs like just shown. It can be safely done with other LEDs on an appropriate power supply.

I was going to write an article on this about five years ago but thought it was too dangerous. I'll post some pics from the article.

One safety issue here is that if the circuit board gets detached from the power supply then the power supply can float to 1.4 times line voltage (peak voltage). This means 170 volts and about 390 volts as mentioned above. To verify this I have lit up UFO lights with all of the LEDs wired in series and turned the LEDs on. The LED bulb is power limited but will float up even on the UFO light. Don't try this yourself.


One thing that I’ve noticed over the years is that as LEDs become more efficient and more reliable that manufacturers are running them at higher temperatures which allows smaller heat sinks to be used. This becomes an issue when LED bulbs are direct mounted to Space Bucket lids, for example (this can be done safely with LED spot lights since the cover does not not need to be removed). I was surprised in testing just how much a tiny bit of airflow in the bucket can make. Here is a thermal shot of an 8 watt “60 watt equivalent” bulb that has a little airflow in the bucket versus no airflow. That’s about a 50 degree F difference!

As a point of reference here is what a 26 watt CFL looks like with a thermal imaging camera.

Why this can be an issue is due to the thermal characteristics of the plastic used in these buckets and lids. High density polyethylene is used in buckets. One always wants to stay well away from the melting point which is 267 degrees F (131 C). BTW the autoignition point is 710 degrees F (380 C) which is where the plastic can catch on fire. This is higher than most woods and what makes Space Buckets safer than a lot of people realize and in five years, with likely thousands of builders, there has never been a report of a fire with Space Buckets. One reason is that using any sort of HPS is highly frowned upon.

I have forced melting with high power COB LEDs and black HDPE buckets in a controlled setting, like you would use in Space Buckets.

So the main safety issue with LED light bulbs is when the cover is removed. I have seen small LED grow lights out of China that uses medium power LEDs that seem inherently unsafe.


I’m a former union industrial electrician some I’m going to use a bit of “appeal to authority” here. You want to use Scotch Super 33+ electrical tape if you can get it. The Scotch 35 series would be a second choice. Scotch 35 will not stick as well than Scotch Super 33+ as per specifications (about 27% less) and but does have a little bit higher breaking strength (I had no idea until I recently looked up the specs). They both have the same voltage rating and temperature rating of up to 105C/220F.

There is Scotch 88 tape which is in a league of its own. It would be used to insulate split bolts and then cover with Super 33+. I’ve also used it for under water electrical splices in a parking lot and in an oil refinery were the electrical work starting time was based off the tides.

BTW, water proof splices would go: wire nut the splices, wrap in Super 33+ trying to make the splice water proof, wrap with 88 tape and improve water seal, another layer of Super 33+, cover in heavy heat shrink tubing, varnish the ends of the heat shrink tubing to encapsulate everything, use a high voltage megohmmeter with the splice under water and fix any splice that does not pass the megohmmeter test. This was for 277 volts.

Most all other tape is cheap crap that I only use to temporarily hold things together. The adhesive is not going to hold up over time like Scotch particularly at higher temperatures/humidity and it definitely feels different. But use other tape if you have no other choice. It’s not going to hold up well if submerged in water such as to quickly couple a water pump to a water line, for example, where Super 33+ will.

What it has to do with us is wrapping the socket where the socket meets the bulb. There may be some of the socket metal exposed. Normally this would be at ground potential but what if it has been wired up backwards or the hot and neutral on the socket mixed up? I’ve seen both happen. Also in higher humidity locations it’s just a good idea to wrap everything up especially if the below aluminum foil reflector is used. I have seen guttation in my own Space Buckets which is going to be plant/strain specific if your plant has a chance of getting it. A fan running all the time will prevent it from happening.

Keep in mind that Space Bucket cloning chambers will have a relative humidity of 90-100%.

--show close up pic of socket tape wrap


--show off cheap and efficient reflector design with an unmodified bulb. The reflector is heavy duty aluminum foil folded over itself so the reflector is more robust.

--the reflector’s beam width is adjustable. It can get more light on the plant in all situation compared to an unmodified, no cover removed bulb and most situations compared to a bulb modified to remove the cover.

--The reflector will cool down the bulb’s heat sink. 9 watt/800 lumen bulb went from 152F(66.7C) to 140F(60) at 60F(15.5C) ambient tested using a FLIR E4.

--You must tape wrap the exposed socket metal if using an aluminum foil reflector since it can move around!!! It will also press the foil to the heat sink more securely for better heat transfer. A loose reflector will not cool off a bulb.

--One way around this is to use a hole saw and some clear Plexiglass to create a cover attached with five minute epoxy (five minute epoxy needs five hours to cure before applying heat). A glass panel can also be used as per Ekrof’s design. The idea is to make anything you do toddler proof because one only needs to make a single mistake to potentially have a life changing electrical injury.

pics to add in to article

https://imgur.com/a/0xZKV ekrof showing glass with bulbs

https://imgur.com/a/Ic690 line voltage egress protection

https://imgur.com/a/zhgXI line voltage with capacitor

https://imgur.com/a/ULoJp modern 100w equiv

https://imgur.com/a/2ZBgK modern corn cob style bulb

https://imgur.com/a/fxebx old 15 watt light

https://imgur.com/a/g2Qbz old 24 watt light

https://imgur.com/a/nDVdX old bulbs on bucket

https://imgur.com/a/D9HbA old switcher 40 watt equiv 9 watts (don't do this )

https://imgur.com/a/SD115 LED bulbs epoxy down


important short video

2 years, 4 months agoGlintingGonzo posted comment on SpaceBuckets.
Dec. 13, 2017

What about something like this?

First time growing autoflower and I have some questions. [R]

2 years, 4 months agodietcokeblood posted submission on microgrowery.
Dec. 1, 2017

Hi, I'm experimenting with growing off season with autoflower plants, and I started with one, a Northern Lights Auto, and she's 24 days old today and her cycle is 75 days, and I think she's already going into flower! I googled it and some autoflowers can go into flower in 3-4 weeks? My plant has been getting 20 hours of light a day and is just under 7" tall, if she goes into flower now, how will I get a decent harvest from her?

I bought a seed recently with this batch of seeds and it flowers 97 days, I'm trying to find autoflowers with longer grow times so I can get a decent sized plant before they go into flower. Any advice?

Here are pictures:



See what's circled? I think she's going into flower:


I don't understand how my autoflower is so small, when I see pictures on the internet of 3 foot tall autoflowers. Do you have any advice for me? Thank you!

2 years, 4 months agodietcokeblood posted comment on microgrowery.
Dec. 1, 2017

She is outdoors from 9:30am-8pm, and then in the garage under this light:


From 8pm until 9:30am.

ETA: She's double the size of my photoperiod plants at 24 days, so I know she's growing faster than my yearly outdoor grow.

Anyone else’s plants exploding right now? 😍 [R]

2 years, 4 months agoNov. 22, 2017


2 years, 4 months agoKetaloge posted comment on succulents.
Nov. 23, 2017


I have two of those plus the 15 watt version for my props and seedlings. 4050 Lumen for the 45 watt version. Should be enough for most succulents depending on distance from the light.

Weekly Questions Thread November 16, 2017 [R]

2 years, 4 months agoKetaloge posted submission on succulents.
Nov. 16, 2017

Hi folks! Do you, like me:

  • Have questions which don't feel worthy of an entire post?
  • Wanna postulate what would happen if you did ____?
  • Need input from more experienced people?

Post away! If you have questions which have gone unanswered in one of the previous threads, post 'em again!

If you have a grow light/winter question, please take a look at the Overwinter Megathread from a couple weeks ago to see if your question has already been answered there!

2 years, 4 months agoKetaloge posted comment on succulents.
Nov. 19, 2017


I just bought two of those after having the 15w version for a while now. The 15 watt one is enough for most of my plants but it doesnt quite bring out the nice colors of most of them and my e. prolifica is still etiolating like crazy. The 45watt one will be enough though I think.

Found in a hidden room in my parents basement, is this what I think it is? [R]

2 years, 4 months agochalkiest_studebaker posted submission on microgrowery.
Nov. 18, 2017
2 years, 4 months agochalkiest_studebaker posted comment on microgrowery.
Nov. 19, 2017

I know those LED panels. Theyre garbage. And seeing how high theyre hung they cant be doing too much. Guess that's why he has some side panels (looks like the one on the right fell over?)

Also, that weed looks shriveled and tiny. Whatever is going on in there, dude needs serious help. Shits gonna start a fire. RIP your house.


Friendly Friday Thread [R]

2 years, 5 months agoglarblarbsulsul posted submission on gardening.
Nov. 10, 2017

This is the Friendly Friday Thread.

Negative or even snarky attitudes are not welcome here. This is a thread to ask questions and hopefully get some friendly advice.

This format is used in a ton of other subreddits and we think it can work here. Anyway, thanks for participating!

Please hit the report button if someone is being mean and we'll remove those comments, or the person if necessary.

-The /r/gardening mods

2 years, 5 months agoglarblarbsulsul posted comment on gardening.
Nov. 11, 2017

thanks for your help !!!! I'm almost convinced to get Fluorescent... It looks like T8 fixtures are cheaper than t5. There is one for $18.48 but then then the bulbs only come in a two pack.. if I buy a set of warm white and a set of cool white then that would be about $20, at $10 per double pack. So if I have just one 2 bulb fixture and 4 lights, i may as well get another fixture so I don't have any leftover lights. So - 2 fixtures and 2 packs of lights it comes to about $57.

Now these LED ones I found are not as strong as the 300W ones, and seems that people use them for house plants. They are about $30 for one But there was another seller offering 2 for $55.

My only concern is judging from the grammar errors on the amazon listing, these LED seem to be from foreign manufacturers and they don't say anywhere on the page if they are UL listed like the Florescent lamps are - so I have to assume these lamps are not and reviews say they get hot so I really don't want one of these to burn my house down.

So, knowing they're both the same cost what would you do??? Florescent or LED? Or can I just get 1 pack of full spectrum bulbs and one florescent light?

Thoughts on Durban Poison 10 weeks into flower? Looking for advice [R]

2 years, 6 months agodarkblueabyss posted submission on microgrowery.
Sept. 28, 2017
2 years, 6 months agodarkblueabyss posted on microgrowery.
Sept. 28, 2017

This is the light, I have two, one for each plant. Theyre a little shitty but quite cheap so was perfect to start off. Looking at getting a 1000w led panel to replace these two.


Why we should live on the ocean[Mitigation] [R]

2 years, 7 months agoboredweare1 posted submission on collapse.
Sept. 3, 2017
2 years, 7 months agoboredweare1 posted on collapse.
Sept. 4, 2017

What about using grow lights. But more importantly this plan depends on having a small population. I'd imagine 1-2 million max.

Question about overwintering [R]

2 years, 9 months agoJThoms posted submission on gardening.
June 29, 2017

Hey all, so I am new to gardening and have done some research on how to keep some of my plants through winter so I do not have to start from scratch next year, though I undoubtedly will just to have the experiment and thrill of growing something new or from seed. I've read that peppers can do well inside if they are in a cool location such as basement and are getting a minimal amount of light. Similar for herbs I can bring my herbs down to the basement as well to keep cool. 


Now my main question pertains to light. My basement, like most I would imagine, doesn't get a significant amount of light. The area I'd be moving the plants to gets a decent amount of filtered light but it's a few hours of the day and the window faces north, I am in New Jersey so a southern facing window would probably be optimal. I'd like to supplement this with some sort of lamp or overhead lights to keep them going. I could set it on a timer and rest easy. However, I am unsure of what type of light to look for. I've seen some resources mention flourescent lights but I want to be sure first. 


I am looking to have the area cleaned up and cleared out so that the plants will fit comfortably on the table and try to assess how much light they will be getting. Though I am looking to you all for suggestions on indoor lighting for plants. I have to look in the basement to figure out a way to rig it up but that shouldn't be too difficult.

2 years, 9 months agoJThoms posted on gardening.
June 29, 2017

I've seen on Amazon, as I did some light searching, these LED grow bulb setups. 45W grid of LEDS that are used for growing, at least from seed, indoors. I know you've recommended the flourescent tubes but what's your opinion on these? If it's similar to what you are saying where they keep growing all winter I could see it being a fair replacement to the tubes.

I only used the basement as an example as I do not have a garage and the only south face window which would get enough light exposure is right above a heating element which I have read could interfere with the plants. It also happens to be my dog's watch post, therefore I think the basement would be the best compromise. I will look into setting up the shop lights or perhaps if you are able to recommend, that LED setup.

Sweet 100 tomato not flowering. [R]

2 years, 9 months agodemolition22 posted submission on hydro.
June 28, 2017
2 years, 9 months agodemolition22 posted on hydro.
June 28, 2017

I got this one from Amazon.

45W LED Grow Light, UNIFUN New Light Plant Bulbs Plant Growing Bulb for Hydroponic Aquatic Indoor Plants https://www.amazon.com/dp/B01F53LP46/ref=cmswrcpapi_1davzb63SSH7P

Reapers, Jalapenos, Habanero and a Scorpion. Jalapeno and Habanero producing and the babies: 2 Reapers, 1 Scorpion and 1 Jalapeno. The little ones finally got put into buckets. Part of the delay was I needed to build a new grow room, this new one is roughly 4x6x6. [R]

2 years, 9 months agoIcouldbeanyone posted submission on HotPeppers.
June 25, 2017
2 years, 9 months agoIcouldbeanyone posted on HotPeppers.
June 26, 2017

I have mine currently on my laundry room shelf with an LED light. Ha. Nice setup. I don't have any reflective insulation right now since I will be moving mine outside soon. But next year I plan on it. Would you say it's cheaper to do that or just get a tent?

Anyone curious, this the LED and hooks I have:



The leaves on my bush tomato plant are curling as the plant starts to grow. That's a grow light I've just installed to give it more light vs. just the window. Apt in NYC. Is this anything I need to worry about? [R]

2 years, 10 months agombonaccors posted submission on gardening.
June 11, 2017
2 years, 9 months agombonaccors posted on gardening.
June 20, 2017

Haha - here is some additional information.

  1. It's a 45 W LED Light - https://www.amazon.com/UNIFUN-Growing-Hydroponic-Aquatic-Indoor/dp/B01F53LP46/
  2. Window faces south gets half days worth of direct sunlight
  3. It's a bush tomato plant (Bush Boy)
  4. It's standard miracle grow potting soil
  5. Using miracle grow plant food - mixed into water once a week
  6. Watering every other day, when top of soil is dry-ish
  7. Yes, there is a hole at the bottom of the container but it has never drained.

Best LED plant lights for growing plants indoors? [R]

2 years, 10 months agomdgates00 posted submission on gardening.
May 22, 2017

I currently have one small LED grow light that is doing fine with my low light indoor plants.

However, I want to expand and grow larger and high light plants. What kind of LED light would work (watts)?

2 years, 10 months agomdgates00 posted on gardening.
May 22, 2017

What you really want to ask is how many Watts per square meter (or square foot). If your garden bed is large, you'll need more light. And light that doesn't hit the garden doesn't count.

Something like this covers about 4'x4' with pretty good brightness. With all the LEDs pointing at the plants, this will be far more effective than a LED grow bulb in a typical household lighting fixture.

First time grower - question on lighting choice... [R]

2 years, 11 months agoBscott05 posted submission on microgrowery.
May 10, 2017

Hey! So I have a grow tent (48" x 24" x 60" Mylar'd) and have two 3 gal smart pots. Going to grow two of same strain soon ( seeds shipped yesterday 😬). I originally planned on using 4 cfl's til they had signs of growth and then upping to 8-12 for final. Wondering if I can replace the 8-12 cfl's for something like this: LED Grow Light.

Could I get roughly the same growth and yield using the one led vs the cfl's?

Let me know if there is any other info you need from me to give me a better answer. Thanks again! I'm stoked

2 years, 11 months agoBscott05 posted on microgrowery.
May 10, 2017

So.. as I was looking at more I came across these. They have great reviews, seems like I can get 3 of these and that should cover all of it. Would that work? Sorry for these noob ass questions.. just wanna be sure with a second or third opinion new led light

Întrebați /r/Romania Orice - 05.05.2017 [R]

2 years, 11 months agosomedud posted submission on Romania.
May 4, 2017

Această pagină este destinată întrebărilor de tip TPU, nu foarte serioase sau off-topic. Dacă aveți o întrebare pe care vreți să o adresați comunității /r/Romania, vă rugăm să folosiți acest thread. Firele de discuții lungi și serioase sunt încurajate să rămână separate.

Câteva precizări importante, atât pentru cei care vor să adreseze întrebări, cât și pentru cei care răspund:

  • De cele mai multe ori, /r/Romania nu e neapărat primul subreddit unde respectiva întrebare s-ar potrivi. Vă sugerăm să încercați întâi subreddit-urile în engleză care acoperă domeniul întrebării (de exemplu /r/learnprogramming pentru orice ține de programare).

  • Scrieți întrebările drept comentarii pe primul nivel (rădăcină), nivel rezervat exclusiv pentru acestea. Orice alt tip de mesaj scris pe primul nivel va fi șters. Comentariile de pe al doilea nivel care nu vor adresa corespunzător întrebarea respectivă vor fi deasemena șterse.

  • Acest thread sticky va fi recreat de două ori pe săptămână, astfel că întrebările vor avea un timp de expunere de măcar 3,4 zile, mult mai mult decât dacă ar fi adresate într-un thread nou separat.

NB: Ca efect al acestui demers, thread-urile noi create pentru a adresa întrebări ce s-ar potrivi aici vor fi șterse, iar autorul îndrumat politicos spre acest thread.

Pentru nelămuriri, sugestii, critici, dați-ne un mesaj direct.

Posturile anterioare

2 years, 11 months agosomedud posted on Romania.
May 9, 2017

Mi se par o companie de încredere și cu potențial de creștere.

On an unrelated note, ce părere aveți de produsul acesta?

What is the most cost-effective way to light a 36" x 24" grow bed? [R]

3 years agoWienerGuy posted submission on aquaponics.
March 25, 2017

How many lights of what kind will I need to cover a 36" x 24" grow bed indoors? I'm leaning towards going with fluorescents but I'm open to other recommendations. Would greatly appreciate any recommendations on vendors/brands too if you're feeling generous. Thanks!

3 years agoWienerGuy posted on aquaponics.
March 27, 2017

These grow lights are pretty good for the price.

You would need at least 2 of them. I have 3 lighting a 48"x24" grow bed. Both peas and lettuce have grown very well in this setup. I wouldn't try to grow something like tomatoes, peppers, or cucumbers, though. Greens, peas, root veggies - that sort of thing should grow well in these conditions.

Question about seedling lights [R]

3 years, 3 months agodushadow posted submission on gardening.
Jan. 2, 2017
3 years, 3 months agodushadow posted on gardening.
Jan. 3, 2017

I have a few of these for my plants while they stay inside for the winter. My key limes and custard apple all have new leaves and started to bloom.