LED Lighting Facts Label Anatomy

LED Lighting Facts Label

LED Lighting Facts is a program of the U.S. Department of Energy that showcases LED products for general illumination from manufacturers who commit to testing products and reporting performance results according to industry standards.

Source: LED Lighting Facts

Light Output/Lumens

Measures light output. The higher the number, the more light is emitted.
Reported as “Total Integrated Flux (Lumens)” on LM-79 test report.

Watts

Measures energy required to light the product. The lower the wattage, the less energy used. Reported as “Input Power (Watts)” on LM-79 test report.

Lumens per Watt/Efficacy

Measures efficiency. The higher the number, the more efficient the product.
Reported as “Efficacy” on LM-79 test report.

IESNA LM-79-2008

Industry standardized test procedure that measures performance qualities of LED luminaires and integral lamps. Allows for a true comparison of luminaires regardless of the light source.

LED Lumen Maintenance

Listed as a percentage, this metric estimates the amount of light the LED light source is projected to emit at 25,000 hours at a given ambient test temperature, compared to its initial light output. This percentage is based on LM-80, in-situ performance, and TM-21 projections

Model Number

Unique manufacturer’s model number for the product.

Type

Specific type of solid-state lighting fixture.

Brand

The brand under which each product is available.

Color Rendering Index (CRI)

Measures color accuracy. Color rendition is the effect of the lamp’s light spectrum on the color appearance of objects.

Correlated Color Temperature (CCT)

Measures light color.
“Cool” colors have higher Kelvin temperatures (3600–5500 K).
“Warm” colors have lower color temperatures (2700–3500 K).

Product Warranty

Written as a percentage, this figure estimates the amount of light the LED light source product is projected to produce at 25,000 hours at a given ambient test temperature, compared to its initial light output. This percentage is based on LM-80, in-situ performance, and TM-21 projections.