LED Testing

How are LEDs tested?

IES LM-79-08
Provide procedures for reproducible measurements of photometry, color and electrical characteristics of SSL products.

What can be tested with this standard?

  • Total luminous flux
  • Luminous intensity
  • Zonal lumen summation
  • CCT (Correlated Color Temperature)
  • CRI (Color Rendering Index)
  • Chromaticity Coordinates (x,y and u’,v’)
  • Spatial uniformity of color

IES LM-80-08
Provide methods of the measurement of lumen maintenance of LED packages, arrays and modules.

IES TM-21-11
Provide a calculation tool to interpret the data collected from LM-80 testing; to provide users with lumen maintenance life (e.g., L70) projection, or to predict estimated lumen output values at a given time duration; to interpolate lumen maintenance behaviors for the in-situ temperature (different from testing temperature)

IES LM-82-11
To describe the procedures in performing reproducible measurements of LED light engines and integrated LED lamps, at any given temperature for the performance characteristics (total luminous flux, electrical power, etc.)

To provide safety requirements for LED equipment that is an integral part of a luminaire or other equipment and which operates in the visible light spectrum between 400 – 700 nm.
The requirements also covers the component parts of the light emitting diode (LED) equipment, including LED drivers, controllers, arrays, modules, and packages as defined within this standard.

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