Seems like opinions are split. Some like them, though I assume they probably don't have experience with other lights, others say they are trash and to build your own.
I'm just doing a simple for fun tent grow 20"x32"x 5-6ish feet tall.
Bought one of the "1000w" LED lights that are around $100-150 and seem to be branded 50 different ways on Amazon. Kind of regretting it and thinking I should return for something better.
What do you guys think? Not interested in spending too much or building my own right now.
Light for reference
https://www.amazon.com/gp/aw/d/B071LQ9Z68/ref=sr_ph_1?ie=UTF8&qid=1505850645&sr=sr-1&pi=AC_SX236_SY340_FMwebp_QL65&keywords=dimgogo
I bought 12 - 45 watt led off Woot for something like $25 each, they are multi color and seem to work fine. With that said, i ripped out the drivers when they showed up and mounted them in a big wooden frame and rewired the entire thing with meanwell drivers. They claimed to be 45 watt lights out of the box, but they were really only 25 watts. With the new drivers they are now true 45 watt lights. I use them for growing lettuce and herbs in an NFT system. I also start all my plants out with them. Would I buy them again? MEH...It will nicely cover a 4x4 area i suppose. Its basically a big ass 540 watt light. The leds themselves are probably not very efficient. I only have a LUX meter, and it doesn't see to read very much with them, but they are all red/blue/IR. so they likely don't deliver as much visible light as a 3000k or 6000k would.
If you don't want to build your own, you might want to consider putting a new driver in it. But sizing it will be weird. you might need to take pictures and ask around. it took me like 3 different drivers to figure out what i needed.
The bottom line is this, cheap led lights can and do work, but you must make adjustments to make this happen. The running number I hear is 38 watts per sf for growing stalk plants. But that number comes from using quality drivers and cobs, like meanwell drivers and VERO or CREE cobs (there are others too, don't flame me for this
). You might need to add 30% to the 38 watts number (50 watts) with amazon pre-built led lights, also if your light says its 1000 watts, its probably only 400 at the wall. so it should cover 8 sf, you should be fine with it in your 4.5 sf tent. But if you had something higher end, you would be able to do the entire thing with 170 watts. Less then half the power. I'd guess 4 cobs would do nicely there. Hell, I might have something in my basement if you want.
hope this helps,
MF