Dimmable LED (light-emitting diode) lights have the same energy-efficient characteristics as standard LED lights. However, they include a special feature that allows the light output to be reduced or increased as needed.
Dimmable LED bulbs must be used along with a dimmer switch that's compatible with them. Households that only have dimmer switches meant for use with traditional incandescent bulbs must switch to a leading-edge dimmer before installing LED bulbs. There is no connection between the brightness level of an LED bulb and the amount of energy used, but some people may prefer the customization provided by dimmable LED lights.