Anatomy of the Label

As of March 2012, manufacturers will have the option of including lumen maintenance and warranty on the LED Lighting Facts label. The original five metrics, lumens, watts, efficacy, color rendering index and correlated color temperature, are still required. However, manufacturers can now choose to list one, both or neither of the lumen maintenance and warranty metrics. Therefore, there are four versions of the LED Lighting Facts label available for download:

  1. Current and required label metrics
  2. Current and required label metrics + Warranty
  3. Current and required label metrics + LED Lumen Maintenance
  4. Current and required label metrics + LED Lumen Maintenance + Warranty
Standard Label
The Anatomy of the Lighting Facts Label
Standard Label with Optional Metrics
The Anatomy of the Lighting Facts Label

Anatomy of the LED Lighting Facts® Label

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.
  • 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.
  • Specific type of solid-state lighting fixture.
  • 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
  • If a label indicates that the product has a warranty, a URL with more information has been verified by the program and is available from the product summary.