Fluorescent High Bay - 4 Lamp - F32T8 - 120/277 Volt - Four Bros Lighting HB-4/T8 &#9989; Operates 4-F32T8 fluorescent lamps compare to 400-watt metal halide high bays. Ideal for Both High Bay and Low Bay Applications. Light Bulbs Included &#9989; Electronic start fixture with a 1-year limited warranty. Precision Formed Reflector to Achieve Maximum Light Output &#9989; Includes support hooks and steel chain for mounting. High quality twist locks socket and disconnectors (equipped with an ideal safety disconnector) &#9989; 20-Gauge Steel Throughout The Whole Body. Aluminum Reflector. High Quality Twist Lock Socket &#9989; UL 2459 / CSA 182.3 Power Connector Included. CSA listed, ETL listed, and UL listed for indoor use