I-BEAM® IBZ Series is an energy-saving fluorescent high bay solution that is used one-for-one replacement of common metal halide high bay systems. Optics are engineered to be both highly-efficient and manage the heat generated by the lamps. The thermal vents convect heat rapidly to reduce dirt depreciation by pulling heat and contaminates out of the reflector and away from the lamps. CSA Certified. Allows Optional Wire Guards, Lenses, Tandem Kits and Sensors to be quickly installed (sold separately).