The Coralife Aqualight Advanced Series Hang-On Tank Mount, 1x150 Watt 14K HQI Metal Halide is a reef aquarium light suitable for applications where space is limited.User Manual (pdf file in new window)Features:One 150 Watt 14K HQI metal halide lamp External ballastOn/off switch12-foot lamp cord and 6-foot power cordThree points of articulation for multiple lighting positions Sleek, anodized black-aluminum housing with ventilation grill Highly-polished reflector Built-in cooling fan Glass HQI lens cover Heavy-duty mounting bracket Replacement Parts:We carry all the metal halide replacement lamps and most metal halide replacement parts for the Coralife Aqualight fixtures