IP65 Polycarbonate LED bulkhead. 3 Hour maintained emergency back-up option (AU-BH104EM) and microwave sensor option (AU-BH104MS) available. Life not affected by frequent switching e.g. when used with occupancy controls. Tough polycarbonate body for vandal resistance. Opal diffuser. Wall or ceiling mounting. 20mm conduit entries. Emergency version has integral 3 hour battery back-up. Life to 70% lumen maintenance - 50,000 hours . Non-dimmable. 5 Year guarantee.