Here is a review of the reflectors
Aquacave has them for $99 on their website. If you do some searching on ReefCentral there is a coupon for 5% off.
Looks like they are for mogul sockets but you would have more variety and possibly cheaper bulbs. You would use the minis.
My Reef System: 215g Brick 72x24x29 Dual Overflows | 4x 250w MH | 4x IceCap 39w T5 w/ Actinics | MSX-250 Skimmer | 1/3hp Chiller | 16w UV | Aquacontroller 3 | Lunar Sim | AquaSurf |Tunze Wavebox | 2x Tunze Stream 6101 | MRC Dual Nano Calcium Reactor | GEO Kalk Reactor | Pan World 150PS Pump | Phosban & Carbon Reactors