Metal Halide bulb (See Option to Upgrade your Metal Halide to a higher Kelvin (Whiter & Bluer). For tank height 18" to 36" use MH 175W / 24" to 36" use MH 250W / 24" to 60" use MH 400W), 4 - 96W Super Actinic 03 Blue German Compact Fluorescent bulbs, 2 - 4" fans, light enhancing spider light metal halide bulb reflector, Black Aluminum canopy . This is the BEST system we have to offer. It is a 2-in-1 setup; you can choose to run metal halides and/or compact fluorescent tubes. Dawn to dusk effect - one control for the metal halides and two controls for the compact fluorescents.