Low Light Suggestions?

[Dragon Queen]

Harlock, how wide is the space behind your tank?
I'm looking at getting a over the hood filter and I only have about 2- 2 1\2 inches behind my tank, which isn't moving anywhere for a long while, for more room.

That tank looks like the same as mine also.

 

[saturday]

Lunar lights?

I was looking at light strips at Big als as well, and was wondering about the ones that came with "lunar" lights. Are those only for saltwater tanks? Would those be good for viewing shy fish like plecos at night? I was looking at the 96 watt compact flourescent with lunar light for my 38gal, but wasn't sure if I was correct in thinking that the "lunar" light was a separate light that you turned on at night as there apparently only one switch, and if it is only for for saltwater tanks and not planted freshwater.