Here is what we did: Instead of buying the pre-made "moon lights", which around here were a fortune, we took a trip to the local auto parts store and bought a 12 inch neon blue ground effects light kit. Hooked it up to a 12 volt adapter and attached it underneath to the existing light fixture. Worked like a charm! Gave the tank a nice all over pale blue glow. IMO looks better than most pre-made set-ups I've seen. Paid about $7.00 for the light kit and around $20.00 for the 12 volt adapter. Lots cheaper than the LPS stock of moon lights.