Brilliance LED 035127477497 4.37" x 2.29" White PAR36 Lamp 15W 2700K 120°. The Brilliance PAR36 lamp is designed to fit in standard low voltage PAR36 fixtures and offers a long lamp life. These LEDs are thermally engineered to operate in enclosed fixtures and provide added security by automatically cooling down and reducing lumen output when exposed to extreme heat, such as air temperatures above 125° F. There is no color shift when lumen output is reduced. Dimmable with Brilliance Dimmer and most magnetic transformers.