2 x $17 dollar custom ebay LED panels (1:1:1 5300k white, 450nm royal blue, 420nm violet) 2 x ~ $9 drivers Old computer heatsinks and fans I had laying around Few hours of assembly Misc stuff I had (left over plexi, silicone, wire, etc.) Total out of pocket cost was ~$52. These panels were originally meant to be lights for 2 3 gallon pico tanks, because I thought they were 5 watts each. Turns out I cant read and they are 5 watts per channel, with 4 channels per panel, or 20 watts each. So now I am going to sell them to a friend to use on his 3' 65 gallon reef tank. This is the result sitting on top of a 6' 125 gallon tank. They need to be lifted up at least 12" or so, the light is WAY to intense directly under them. Still, they look pretty workable, especially for the price.