is the LED light panel running horzontal or verticle on the back side of the tank. If Horzontal.. are you saying you put light along the bottom edge of back side of the tank?
It's mounted horizontally to illuminate the bottom-most back edge of the tank. I did it that way so that the light gets trapped in the water, forcing it to act something like a fiber-optic cable and illuminate the front of the tank where the water is much better than further on up the tank wall where the water is not. If you ran it vertically you'd illuminate the "thermometer" viewing window much more evenly.
