SATCO|NUVO's LED Hi-Pro A21 Lamps offer ColorQuick convenience ideal for commercial projects. Choose from 2700K/4000K/5000K color temperatures at installation to achieve the desired atmosphere for the environment. Designed to work in 120V to 277V fixtures, these lamps are compatible with ballast bypass fixtures and are dimmable when used in 120V applications. With enclosed decorative and functional fixtures in mind, these lamps were engineered with fins to promote heat dissipation, even in high operating temperatures.