You are putting a fuge on a 11.4 Gallon tank? Or are you using the overflow box as a sump? Also, I've got some old 4KW Metal Hallides somewhere, I'm sure that would work much better than LEDS
that overflow box is just for the actual overflow, which will go to a sump. fuge will be in the sump.
I'm still checking out stands, so I'm not going to get a sump until I know how much room I have.
The kessil leds are pretty rockin, the halides would probably turn the tank into a hot tub and I'm not looking to add a chiller.