The HL-LI SERIES linear LED luminaire is engineered to stand up to the toughest operating conditions in Class I Division 1 environments such as petroleum refineries and grain processing facilities. A slim profile and variety of mounting options enable this long-lasting, high-performance fixture to address virtually any lighting need in harsh and hazardous locations. As an added safety feature, the luminaire is available with an emergency battery backup option that keeps light on up to 90 minutes after the loss of power in environments up to -20 degrees Celsius.