NICOR Lighting 4-Inch Square Dimmable 2700K LED Recessed Retrofit Downlight, White (DLQ4-10-120-2K-WH) Utilizes high performing LEDs with greater than 95 CRI and an R9 greater than 50 Polystyrene diffuser and reflector cone create a uniform light distribution that reduces glare Die cast aluminum trim routes heat away from electrical components Thermally protected, high efficiency driver standard Operating temperature rating of 0F to 120F (-18C  49C)