Here is a shot of the old lighting system. Triple 175w ballast and moon light was bought used from Steve Tyree off his old 180 SPS tank some of you have probably seen the killer pics of. He had great success with the 175's but recommends 400w now and I would have to agree for a SPS tank. Chiller is mandatory even with my 125 gallon sump in the garage chiller runs every day now that I’m running the 400w MH’s.