Specification grade shallow, 4" Square New Construction housing; Fits into a 2-1/2" plenum space; Can be used in trimmed or trimless applications; Requires minimum 3" clearance around fixture from insulation material; Thermal protection provided in case of improper insulation use; Light engine consists of a single, high output multi-chip LED array enabling preciseoptical control. Excellent fixture-to-fixture color consistency with a 3-step MacAdam Ellipse tolerance.; Precision TIR Optics produce Medium, Flood, and Wide Flood beam distributions; Optics are interchangeable and can be field replaced; All R4S downlights are available for non-dimming and dimming applications; Specification Grade trims are available in different finishes for your space;All trims are wet location certified; cCSAus Certified to UL Standards; Suitable for damp locations; Energy Star certified, except for Lutron and eldoLED dimming options; Can be used to comply with the 2016 Title 24 Part 6 JA8 high efficacyLED light source requirements; Assembled in the U.S.A.