Rated IP66; Suitable for ISO 3-9 Cleanspaces; Suitable for 209E class 1-100,000 Cleanspaces; ETL listed for Wet Locations; One piece overlapping doorframe; Robotically seam welded housing; 0-10v 1{f7496c16e971b835d820517451ee2f93c72eb15ab5c3ca197afd9ca3b2e2ef2a} Dimming Standard for most configurations; Narrow Spectrum 540nm Green LEDs; White / Green Separately Controlled Circuits; Recessed Housing suitable for Tbar Grid AND Hardlid Installations; B.A.A. Compliant & Made in the USA by a Family Owned US Corporation