Approved for open areas in Class 1 Division 2 Groups A/B/C/D environments where flammable chemicals and vapors may occasionally be present, 4 ft hazardous area fluorescent light fixture has T4A temperature rating and comes with six 54 W T5HO lamps that cumulatively produce 30,000 lm. Lamps are held in place by spring loaded sockets and protected by hinged door with 3/16 in. acrylic lens. Operating from 120–277 Vac, light has powder coated, 18 gauge steel housing.