1 - Metal Halide bulb (See Option to Upgrade your Metal Halide and ballast to a higher Kelvin (Whiter & Bluer) and/or higher wattage (Brighter). For tank height 18" to 36" use MH 175W / 24" to 36" use MH 250W / 24" to 60" use MH 400W), 2 - 28W 7100K blue PC Compact Fluorescent bulbs, 2 - 4" quiet fans, Black Aluminum canopy, High Quality elctro-white reflector, Dimensions: L24"xW11.5"xH6.5"