I attached mine with the plastic clips it comes with. I have a 6 foot light, folded in half, so that I have essentially 2, 3 foot strips right next to each other. I have the two halves attached together with small zip ties. The advantage of having the lights close together is that you get some rippling effect. The reason you see rippling with MH and not flourescent is that the light is more centralized with the MH, as opposed to the flourescent that basically cover the top of the tank. If that doesn't make sense let me know, and I'll go take a pic of my setup. As far as color, I'd go with blue, just cause I'm always after the natural look. But, red has the advantage that, at least reportedly, the animals can't see red light, so they think they are in the dark. Red looks cool too, just that I always want things to look as much like nature as possible. They also have white rope lights which would also give a natural look, I'd imagine.