Rated IP55; Suitable for ISO 5-9 Cleanspaces; Suitable for 209E class 100-100,000 Cleanspaces; ETL listed for Wet Locations; Channel Inset Door Frame; Robotically seam welded housing; 0-10v 1 percent Dimming comes standard (except for 22 with HF LED Selection); Up to 35,000 Lm Delivered @128 Lm/W; DLC Standard and Premium Listings Available; Recessed Housing suitable for Tbar Grid AND Hardlid Installations; B.A.A. Compliant & Made in the USA by a Family Owned US Corporation