I have been working on a new LED build for my solana. It is WAY overkill, but I am looking at getting a larger tank and wanted to be able to use this over it when I get it rather than building another light. Here are the specs:
Custom built 18x18 heatsink
24 - 20k 3w LED's
24 - RB 3w LED's
12 - 10k 3w LED's
6 - standard blue 3w LED's
3 - UV 3w LED's
3 - Red 3w LED's
4 - RB moonlight 3w LED's
12 - 700mA dimmable buckpucks
1 - 350mA dimmable buckpucks
60 degree optics
All of the LED's amd optics were purchased from Satisled and my total cost for this fixture had been right about $500.
Yes, that is 72 LED's over a 34 gallon tank. As I said, it is WAY overkill, but should work nicely over a larger tank as well (looking at a 92 corner tank).
I am hoping that by putting so many different colors I can get closer to a full spectrum.
I was unable to find a heatsink that was large enough to work over the tank, at least at a decent price, so I decided to build my own. It is sort of an unorthodox idea but it seems to be working. I got a 1/4 inch aluminum plate and attached a bunch of 1/4 inch "C" channel to it. these are bolted to the plate and have thermal paste between them and the aluminum plate. Here are some pics to give you an idea what I did.
I am still working on all of the wiring, but so far I have all of the 20k, RB, and half of the 10k LED's wired. I set it up so that the 20K, RB, 10k, Satndard Blue, and RB moonlights will each be dimmable seperate from each other. The red and UV will be dimmed together since they are on the same buckpuck. This should give me unlimited control over the color mix and intensity of the light. Here are a few more pics of what I have so far.
Here is a drawing showing the layout of the LED's that I decided on. The section at one end with no LED's it the back of the fixture.