The H Series Class 2 Division 1 Linear LED is a light weight hazardous location fixture. This fixture is designed for areas that encounter a lot of moisture, vibration, corrosion and dust. UL / ETL rated. Commonly used in: Dust environments, coal mines, paper mills, chemical processing or storage, petrochemical manufacturing, etc.Slim design can be ceiling mounted, wall mounted. Constructed on copper free aluminum and thermal shock resistant PC lens. Operating temperature -40 c to + 65 c. Comes in 120/277 volt to 480 volt. 50/60Hz. High output lumen per watt: 137 lm/watt. 4ft. versions Come in: 40 watt 5,480 lumens and 80 watt 8,400 lumens.