DIY LED Light Questions

[Cal_stir]

don't cut the sheets, you will get enough gas xchange with sump and skimmer,the fan will keep the heatsink nice and cool, the leds will fail before the heatsink gets hot enough to set wood on fire

[Beanz]

ok thatnks cal, i am gonna do a water test today and c if the pH is changing as a result of the sheets. if there is i might get some screen but the acrylic is doing a dandy job of keeping the zebra in the tank. I am going out today to get the materials for the fixture so i will start posting pics today maybe, i might get a shot of the zebra too if i can get a good shot

[Beanz]

Ok I built the fixture, but have not added the peices for how high it is gonna b. So how high do u guys think I should have the fixture, and should I use 80degree optics for the height or something a little more focused if the fixture is higher.

Thanks, Ian

[Cal_stir]

my fixture is 1 inch above tank with no optics, the leds emit @ 120 degrees without optics, i find this to be perfect for my application, no spotlighting. i remember reading an article about a guy who used 40 degree optics and he had to mount his fixture about 12 inches above his tank to eliminate the spotlighting effect, my guess with 80s would be @ 4 inches.

[Beanz]

Ok I will try that out, do u think that the 24 LED with dimmable driver kit will be enough light for the back of my tank (6") or would it b better if i saved my money and bought the 36 Led with dimmable driver kit?