Killark LZ2N17230 - Lexan® Clear Lens, impact resistant polycarbonate. Housing-one piece fiberglass reinforced polyester, NEMA 4X & IP66 rated. Two 3/4” NTP aluminum hubs - one at each end (includes one 3/4” close-up plug and two 3/4” x 1/2” reducers for maximum user flexibility). Two 1/4”-20 aluminum bushings furnished in top of fixture for threaded rod. 2’ and 4’ luminaries. Lamp types Linear 17, 28, 32, 40, 44, 54, 60W Long compact 40, 55W (single ended). Electronic ballast standard. World voltage (most models) 120 thru 277V, 50/60 Hz The LZ2N Series Fluorescent Linear luminaires are designed for installation in high bay and low bay applications. This fixture is made with a non-metallic fiberglass reinforced housing that is suitable for harsh and hazardous environments. - Class I, Division 2, Groups A, B, C, D - Class I, Zone 2, Groups IIC, IIB, IIA - Class II, Divisions 1 & 2, Groups E, F, G - Class III, Divisions 1 & 2