Lighting Terms

Watts: A unit for measuring electrical power.

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

Lumens: A unit of measurement for the brightness of 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 2700K temperatures generate a warmer color tone; color temperatures of 5000K temperatures generate a cooler color tone.

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

ENERGY STAR®: A U.S. Environmental Protection Agency 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.

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