The MAR-EX series linear vapor tight is designed for use in hazardous locations that feature the presence of flammable glasses, vapors, or liquids during normal facility operations, and can sustain operating ambient of -40°C to +50°C. This fixture is made with UV stabilized, impact-resistant fiberglass reinforced polycarbonate lens, and is ideal for retrofit of existing HPS/MH and offers higher efficiency for energy savings, lower maintenance costs and quicker paybacks. The optional battery backup system provides a minimum of 90 minutes operation after AC power is lost during an emergency. It operates with 120 or 277V dual voltage.