I didn't understand how far to keep led from plant is it a minum of 2" and a max of 40" cause I have gotten a few uv burns on my leaves?
1404004
The best way to check is to put your hand under it at the level of your plants. If the back of your hand gets warm after one minute, raise it up.
1404005
I keep my light far enough from the plant that I can't touch both at once with the same hand. For instance, if I am touching the plant with the tip of my thumb, I should not be able to touch the light with the same hand unless I lose contact with the plant. Roughly 8 inches I'd guess.
1404006
I am not sure how close that you can put this light to a plant.I have my light 24" away from my plants and they are thriving.
1404007
I keep mine about 14", but i used it for seedlings. I then change to a higher wattage lighting. hope this helps.
1219373
diameter 4 1/2 inches. if you count the plastic shade it goes down to 3 1/4 inches.Not sure about LED I never used them... i have a 23W CFL in mine.
1117521
I wanna say about half an inch? The thickness and length are pretty good. From what ive noticed they're pretty durable unless you apply pressure in between/on the LED's. It makes the light nearest to the pressure to turn off until the pressure is let off...Other than that they're pretty much the same quality as any other more expensive brand LED.
130990
I keep my tomato seedlings only a couple inches below the lights. The lights put out a lot of light but don't get hot enough to burn the seedlings. Two feet above is way too much and will produce spindly tomatoes.
1284988
I am pretty sure it is very low, led's don't put out many lumens. Lumens is a measure of light humans see. Par is what plants see. I found a watt to lumen calculator online. Seems to be about 18,000 lumens, From what it says a 300 watt led puts out.
1111928
Depends on the temps you're looking for. As another answer said exo-terra reccomends 4-16 inches, but the manual does say to keep the bulb 3 to 4 feet away from any reptile that the bulb can "sun burn" a reptile. My beardie started in a 20 long, the bulband basking spot off center which gave me about 30 inches diagnal to the cool side where i placed a hide. To let the dragon out of the light, that she never uses
577223
it puts out an initial 16,000 lumens. but the light fades very quickly. the good news is that there's no heat generated from the bulbs, so they can be close to the plants. I recommend about 2-3 inches away (no further) from the foliage. I will also add that I was skeptical about fluorescent lighting systems entirely, until it tried these. I am impressed. just keep them close to the plants. (-:
407271
My pole was 4" by the way and it withstands all kinds of weather. It's a good product but I wish the bulbs were not halogen.
1665753
Daylight, and the heat is cool enough that, your plants can get as close as 6in. without burning the leaves. Hope this helps.
1029267
I was unaware that any of these UV LED modules were rated for more than 4.2 volts, until I read the specs on subject unit. I own several UV LED modules that appear identical in construction; purchased at different times, from different sellers. All are unmarked for voltage range. My unfortunate experiences have been that applying significantly higher than rated voltage will damage or burn out LED modules in short order. My amperage draw (thus, draw wattage draw being computed) tests with several such UV units using a fully charged (4.2 V) 18650 battery show that they typically draw (V x A = W) between 1.72 Watts and 2.98 Watts. Tests with other LED modules that are marked for a voltage range (like 3.0 to 9.0 or 18.0 Volts) always have shown that higher input voltages typically result in an increased Watt draw, using the previously cited formula, and brightness output. Even at a 1.75 Watt draw these modules produce a UV radiation output that is several times greater than that other commonly available types of LED UV pocket flashlights. Yellow UV blocking eye-wear (available on Amazon from about $5.00) should be used with them to minimize the risk of eye burns from reflected radiation!
683204
About 4.5". You will need space for the LED driver which can be conceal in a handy box 2/4". The fixture get very warm when you leave it for along period of time so you will space for veting.
1250946
I don't know, but my candelabras measure 4 inches, and some of my led's measure 4 1/8 inches. I have a different issue. Finding led's with enough lumens. 300 or so lumens doesn't do it for me, I'm looking for 500 or so.
1688436
Short. I'd say about a foot and a half. The reasoning is that if you string them together, as I have done, the gap between the first/last light in the connected run is the same as the regular distance (3') between the bulbs. This way you don't have to coil the cord to get the correct distance making it look great - just plug the cords together! I used weather-proof covers for my string to string connections although finding BLACK colored ones was slightly difficult.
505484
Keep plants at least 8" away from lights and make sure area is ventilated--otherwise you may find wilted, dead plants! Keep them under 82 degrees.
276763
It is not very bright. i have focused the lights on a tree but the light hardly reaches the leaves. the max you might get is 2 feet
1201751
The light is pretty warm, and natural. I'd say they would reach 2.5 meters. As my older lights wear out and die I'll replace them with this one for sure.
130992
I recommend that this light only be about 2 INCHES from the seedlings, not two feet. Spindly plants are due to insufficient light.