Not sure if anyone has done this before, but this seems to work pretty great if you have a light hood that came as a kit with your tank. Will probably work with other sizes, but I have a standard 10 gallon light hood for my aquarium that came with the 'starter kit.' The one with the 2 incandescent bulb fixtures inside. Well wouldn't you know, If you pull out the reflectors and the old wiring, two 10 watt LED 6000K flood lights fit right into that puppy almost perfectly. And since you pulled out the original wiring, you have 2 holes in the back of the hood that the LED wires fit right through and ventilation slits right above the lights. All you need to do is drill 4 holes (2 for each LED) through the light hood and attach it with the LED's supplied screws. The reflectors and old unit come right out with just a couple screws. I still have to get a waterproof junction box and attach it to the back or top, connect the LED's to a grounded plug and seal it up. If you wanted to, you can even set it up with a switch on the outside of the junction box. Haven't decided yet if I want to hang the fixture over open water or sit it on top of the glass hood. But since the LED's are rated for outdoor use, you can go either way. I'll also be plugging it into a GFCI outlet anyway for added protection. Any other ideas are welcome. So far this seems like a pretty great way to upgrade that light hood. The LED's do stick out just a bit below the original hood, but I don't mind it. I'll post more pics when I complete it. (By the way, I've already wired it to the grounded plug and tested it, works great).