HI Guys!

As a recovering electrical engineer, I've read this thread with great interest.

But one thing is puzzling me. It's the return on investment.

I can get a 48/50/55 watt red/blue panel grow light on eBay for about $90
... and all I have to do is plug it in.

On the other hand, 3 of the LEDengin 15 watt LEDs will cost over $100

The only thing that I've found that seems to be cheaper is a design that uses 1 W LEDs. The design is currently listed as "96 LED Array plant grow Illuminator DIY kit" for $80 plus shipping

The 12V power supply is not included, but any old PC supply should work.

This design seems to give about twice as many watts of light for about the same cost as the above panels, and you still have the joy of having something to build!

- Mountain Mike