Versatile heavy-duty, explosion-proof LED fixture designed for hazardous environments where flammable gases or vapors, flammable liquids, combustible dust and/or ignitable fibers may exist. Suitable for wet locations and marine environments where the saltwater spray is an issue. Also suitable for indoor and outdoor areas where corrosive chemicals exist. Seismic testing ensures fixtures will withstand heavy vibration. Explosion-proof, impact and heat-resistant glass tubes, provide LED protection.