Energy saving upgrade without sacrifice A bright, energy saving alternative to standard halogen PAR lamps. Halogen PAR lamps reduce energy consumption without sacrificing the qualities of a traditional PAR lamp. They uniquely produce light more efficiently. They work with dimmer switches and are available in the familiar PAR20, PAR30S, PAR30L, and PAR38 shapes. Use them in existing fixtures just as you would standard halogen PAR lamps. Provides at least 13% energy savings;Fully dimmable and Instant-on;Mercury Free;Rated average life of 1100 hours Ideal for residential use in living rooms, bedrooms, hallways, bathrooms, dining rooms, offices and kitchens, as well as for commercial use in offices and retial spaces. Can be used for indoor or outdoor applications.