These specialized light sources, found at major home improvement retailers, offer users three distinct levels of illumination from a single bulb. This functionality is achieved through internal circuitry allowing for varied power consumption and corresponding light output when used with a compatible lamp.
The benefit lies in enhanced control over ambient lighting, contributing to energy savings by allowing users to select only the necessary level of brightness. Historically, this technology was exclusively the domain of incandescent bulbs. However, advances in light-emitting diode technology have enabled similar functionality with significantly improved energy efficiency and lifespan. These attributes are contributing to their increasing adoption in residential settings.