So I finally have a job and can easily build my own hood for my 180 gallon. I would like to make it a normal hood, made of wood and enclosed. My only question is, for the T5 lighting fixtures I will be putting in it, will I have to worry about water condensation collecting on the lights? Should I just leave the top open with plastic egg crate on top to release heat from the lights and prevent condensation? Or should I put a piece of plexiglass between the lights and the water and leave the top open? Or is a closed top acceptable with no plexiglass between the water the and fixtures? The light fixtures will probably sit about 6-8 inches above the tank inside the hood. Thanks in advance for any help you can give!