The Brilliance MR11 Bi-Pin is designed to fit into standard low voltage MR11 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. Suitable for damp locations and for use in totally enclosed luminaires. Not for underwater use.