To go reef you will need at lerast a 4 bulb fixture. The reflectors are very important when picking one though, individual reflectors will give you the most out of the bulbs. I like ATI bulbs myself, great color and my corals love them. At only a couple bucks more a bulb it's a worthwhile investment.
180g Reef - 60g Rimless Reef UNDER CONSTRUCTION-90G FOWLR- 125g Malawi Cichlids- 40b REEF-
I have a mix of many different saltwater fish amongst my tanks, too many to actually list here. LOL