Well, thanks to DealExtreme I can at last afford my very own aquaria LED grow light. I've been keen on this idea for about a year now and first encountered them on Nanoreef.
Here is my design:
I have three of these, each heatsink is 8.4 X 8 in. and holds (9) Cree XR-E 3W LEDs on a 3" grid, and (14) 5mm RGB LEDs for looks. I had to use some empty 20mm stars for mock up and drilling because I ordered the LEDs from DealExtreme and their shipping takes forever. But...the order came in over spring break and I'm going to pick it up from usps tomorrow.
I am hoping this will work as a modular system that can be used on any of my tanks. I was thinking that two over a 10 gallon, three over the 20 long, or three raised and spead a bit over my 3' tanks (46BF and 30L) would work nicely. I'm planning on the Crees needing to be dimmed over the 10 and 20L, so maybe full power over the 46 would work?
It's going to be controlled with an Arduino UNO. I should be able to dim the Crees of each heatsink individually, but the RBGs will be controlled in unison across each heatsink (there's only 7 PWM channels on the UNO).
Parts list so far:
(27) Cree XR-E WD LEDs==$73.65 (Deal Extreme)
(3) 1000mA 30W Drivers==$33.63 (Deal Extreme)
(3) 8.4" X 8" Aluminum extrusions==$54 (heatsinkusa)
(50) 5mm RGB LEDs==$3.99 (ebay: 2008topshop)
(100) 5mm LED holders==$0.6 (ebay: citychainch)
Still need power supply for RGBs, some nice ribbon wire for RGBs, an enclosure, hardware, mounting system, other.
thats all for now folks