vibe, those are the original lights, 24 watt 10K. A lot of people are upgrading the lights with the CSL 32 Watt retrofit but they are very hard to come by now, CSL is out of business. I put the moonlite in. JBJ claimes this is 12 gallons but it's no more than 10 empty, probably 8 in the display area. If I were you, I'd think about going bigger! I heard that JBJ is coming out w/ a 29 gallon all in one this summer and a new hood for the Nano-Cube offering 48 watts. I'll believe it when I see it. I'm extremely happy with the whole set up but allready have the bug to go big!