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Light Output — Making sure it’s bright enough

The energy savings are significant, and that means lower electricity bills. Light output is measured in lumens at the light source. To determine if the light is bright enough, be sure that it produces sufficient lumens to meet your needs. Ask your lighting supplier for advice on how much light you need for different parts of your home.

Color Temperature — Specify the light color you want

Different light bulbs emit different colors of light. Lighting color ranges from cool to warm tones, and is known as color temperature. The color temperature of a light source indicates the color of the light emitted measured in degrees Kelvin. Color Temperature is not an indicator of lamp heat. The chart below shows a range of color temperatures, from warm to cool.

Color Rendering — Accurate color replication

Color rendering index (CRI) is a measure of how accurately an artificial light source displays colors. CRI is determined by comparing the appearance of a colored object under an artificial light source to its appearance under incandescent light. The higher the CRI, the better the artificial light source is at rendering colors accurately. High (above 80) CRI is preferred in the home.