The CRS is designed to meet the toughest requirements in clean room and BSL applications. The enclosed and gasketed housing and one-piece door protect against infiltration of airborne bacteria. Die-formed edges on the door frame and the hole-free housing prevent air exchange between the fixture and plenum, allowing re-lamping without contaminating the area. One-piece gaskets are included on the lens and on door edge for easy replacement. It is UL/cUL listed for wet locations and IP65 rated and manufactured in accordance with ISO 14644, NSF and Federal Standard 209E in a certified ISO 9001:2000 facility.