The Coralife Aqualight HQI Metal Halide Pendant 1x150 Watt is a reef aquarium light designed to hang from the ceiling, giving easy access to the tank.Dimensions: 9.5" X 27" (27 inches refers to the vertical clearance including space for the light, cord at its minimum 9" length, and ceiling mount)Includes: One 150 watt 10K HQI metal halide lampRetractable lamp cord that extends from 9" to 56"External remote ballastReplacement Parts:We carry all the metal halide replacement lamps and most metal halide replacement parts for the Coralife Aqualight fixtures