Today, 01:01 PM
Join Date: Jan 2014
Location: Mukwonago Wisconsin
| | Re: need a led light that is 18 or 20" long
build on with a 20" long piece if channel alumnium. then add 4 daylight 6,500K and 2 cool white 3,500K LED's. use a variable currect driver as the size of the tank will have a big determination on how much wattage you will need. I doubt more than 1 watt per 2 gallons would be needed.