Dimmers reduce power to the lighting source or bulb, so they save energy and can extend bulb life. Incandescent and halogen bulbs last up to 20 times longer when used with a dimmer, increasing the money saved. LED bulbs run cooler when dimmed which can also extend bulb life.
1) Estimated lighting savings based on a power reduction of 20% (dimmer) and a 50% reduction is hours of use (sensor).
2) Estimated savings based on Lutron sales; 296kWh annual energy use for residential circuits (a); 2,492kWh annual energy use for commercial circuits (b); 20% savings from dimming (c); a U.S. average electricity rate of $0.11 per kWh (d); estimated greenhouse gas equivalency (e); and the average generating capacity of a coal power plant (d).
Computed from energy usage by room type (Source: Navigant. 2002. U.S. Lighting Market Characterization.) and surveys of installed room types (Lutron commissioned Ipsos surveys).
Computed from 712W per circuit (Lutron project data.) and 3500 annual hours.
Lighting Efficiency Technology Report: Volume I. 1999. California Energy Commission.
Energy Information Administration (EIA)
U.S. annual non-base load CO2 output emission rate, year 2007 data U.S. Environmental Protection Agency, Washington, DC.