This is the MHT Lighting 400W ALUMINUM HIGH BAY FIXTURE and it has a 100,000 Hour Product Lifespan (IESNA). 10 year OR 60,000 Hour Warranty. High Pressure Die-Casted Aluminum Gear Box. Smooth (LB) or Faceted (HB) Aluminum Hood. UV Stabilized Prismatic Acrylic or Clear Polycarbonate Lens. Photocatalytic, Anti-Dust Treatment on Lamp/Lens. UL Listed. Ambient Lighting Temp: -30 to 120 degree Fahrenheit.