Lighting Terms

Watts: A unit for measuring electrical power

Lifetime Hours: The average amount of time that a bulb can stay lit before the end of its life. ENERGY STAR®‘s lifetime hour ratings are based on an average of 3 hours of use per day.

Lumens: A unit of measurement for the brightness of the light. If a light bulb is blindingly bright, it produces a lot of lumens.

Dimmer: A control that regulates light levels.

Color Temperature: The appearance of light in terms of warmth or coolness. Color Temperatures of 2700 Kelvin (K) temperatures generate a warmer color tone; color temperatures of 5000 K temperatures generate a cooler color tone.

Color Rendering Index (CRI): A measure of how light sources render colors. The higher (to 100) the CRI, the better the color rendering.

ENERGY STAR®: A U.S. Environmental Protection Agency (EPA) voluntary program that helps businesses and individuals save money and protect our climate through superior energy efficiency. Products can earn the ENERGY STAR® label by meeting the energy efficiency requirements set forth in ENERGY STAR® product specifications. EPA establishes these specifications based on a set of key guiding principles.

Did you know?

LED bulbs last 25 times longer than incandescent bulbs and are 80% more energy efficient.

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