I am tell you that the 8 bulb is overkill for this shallow of a tank. I would say a 6 bulb would be plenty and just play around w the height of the fixture. As for kessils... Meg, the only kessil I have had is the purple h150 over my fuge and I love that thing, but as for lighting the DT, I can't say that it's my choice for lighting. Granted, they work, but for my personal liking, it's no what I'm looking for. There's a distinct difference between each lighting option and let's face it, they all work, some maybe better than others for the specific application, but I feel like it's mainly personal preference on how you want your lighting to look. I'm just frustrated bc I like the look of Radions and the look of an ATI fixture.... Therefore I almost wanna start another tank, that way I can have both, radio me on one and a SunPower on the other.