This thread has a long discussion on measuring LED light sources in terms of plant productivity. I'm sure lumens are mentioned numerous times.
i sometimes have to read something a few times to catch it.
Just mounted the 20 watt one with 16-660nm and 4-445nm so we'll see how the deathstar likes it tonight. Here's the ebay store where I got them.
Good to see you back hyroot. I'm using the same # of bulbs but switched the 4 5000k's for 4 2700k's because I added 24 watts of T5 HO 7000k UV. The current set up is 12-2700k bulbs in the hood and 8-2700k bulbs for side lighting which is 190 watts of 2700k cree bulbs at 13.5/10.5 and 24 watts of T5 HO UV for 5 hours in the middle of the light cycle with 10 minutes of 10 watt 730 nm at lights out.
It's hard to say because the deathstar was in such bad shape and is recovering very slowly. It was already a couple weeks into flower and in to small of a pot, so I just put it in a 7 gal and threw it into the tent. The new growth looks decent but it's going to be a stunted little plant I think. If it wasn't a deathstar I would probably put her out of her misery. I have another 3x3 tent coming and I'm going to share that light setup between the two tents, should only take a couple minutes to move them the way I have them setup. I have another critical kush mainlined to 8 ready for flower and should be able to tell how the lights are performing with her.
