Ive seen some of the led things folks have been putting together over the years and thought I could do better. This is a solid sheet of LED with 660 and 470nm lights the most powerful available in 5mm. I found some better blues at 430nm that are really bright and I should have used those instead. I thought of alot of improvements including a way to achieve 90% power efficiency from the wall socket and a way to adjust the power going into the red or blue lights if you want to 'change seasons.'

Theres just one point I dont think anyone has touched on here yet, is the efficiency of LEDs. They can be around 10-20% efficient, meaning 80-90% of the power you put in is turned into heat, and this is not much better than HPS. More power is wasted into heat as you convert AC to DC, and then even more when you regulate your DC to 20mA.

I heard some folks mention that the high-flux LEDs that require a heatsink are the only ones that work. It takes about 60 discrete 5mm LEDs to equal the luminous flux of 1 high power led. The thing is, 60 discrete LEDs are 1/5 the price of 1 high power LED and thats not including the heatsink. Additionally, high power LEDs have a much lower rated lifespan.

Anyway, let me know what you think. I have not tested it on a plant but I know it kicks the crap out of eco green star and ledgrowlights.com.