I had originally planned to rapid prototype a mounting bracket for a P4 heats - Thread Here
Unfortunately, I couldn't get the price below $100 - and my budget is pretty tight. Also, it may have fallen apart as soon as I attached the heat sink
Instead, I decided to attempt a steam bent wood mount for the grand cost of $3.65. I have never attempted to bend wood before, so this was quite a fun experience.
First, a quick price-out:
20W cool-white LED $6.97
12V to 30-34V current driver (microtek 20/30w) $6.54
12V power supply $5.99
Heatsink + Fan $7.97
Poplar board $3.65
Lens + reflector $3.25 (have not yet received)
Onto the build:
I steamed the wood over a pot on the stove for ~2 hours.
A few basement clamps, an aluminum pot, and a torrent of obscenities later - I had the wood bent. I plan to leave it on the pot for at least 24 hours to help the shape take. (will report on whether it does or not)
I decided to use a "Clear Cube" server heatsink as the cooler for its streamlined look and low profile.
Using white lithium grease and super glue I mounted the LED diode set onto the base. If this were a 50 or 100W build I probably would have gone ahead and ordered some legitimate thermal adhesive. But, I happened to have these on hand - so on they went.
I soldered up all the leads and tossed the driver into a small project box.
The fan is powered in parallel, using the 12V supply.
After nearly blinding myself, I have concluded that it works - but that I will need to tune down the fan, which is loud as all hell.
On the plus side, the heatsink remains cool to the touch after extended operation.
The light is scattered across 140+ degrees, but using a 10x lens and hood it can be focused down. I ordered a 30 degree optic kit so that the light can be suspended ~4 inches above the tank.
Here is a shot of my 52mm 10x lens
and some of the nifty effects it can produce
Great, even color eh?