by the way, that was mounted on Lexan that I bent with a #10 hole drilled in it for the bulb and superglued to the canopy................here the bulb sits slightly in the water, but JUST THE BULB, NOT THE CONNECTOR!!!!!!!!! if the bulb is out of the water it causes a "beam" in the water and that wasn't the effect I wanted. in the water produces a more even look............be sure to have a ground on your tank just incase the wiring gets submerged (even though it's low voltage), and silicone the wires after soldering