I have been searching for the cheapest and easiest way to build a led grow light and thiis is what I have found. [ame=http://www.youtube.com/watch?v=l2iMFPiltf0]96w DIY LED Grow Light - How to build it for $57 - YouTube[/ame]
Well, I'll be very curious to see if something like this would actually work. I'm afraid I don't have any input on whether it will or not, though.
It will work, but the efficacy of these cheap chinese Leds is not that great. Probably around 50 Lumens/W. The spektrum and efficacy is similar to regular cfl bulbs. I don`t see many advantages, the only one that comes to my mind would be the light bundling due to the lens.