Photometric testing of LED lamps, modules, and luminaires

According to UNE EN 13032-4

The lm-79-08 is an American standard created by the IES (Illuminating Engineering Society of North America) in 2008. It indicates the procedure to measure the photometric, spectral (Colour) and electrical characteristics for LED technology. It was the first standard to talk about LED measurement or Solid-State Lighting Products (SSL) and laid the groundwork for new standards and recommendations such as EN 13032-4 and CIE S 025

Photometric tests provide a comprehensive service to measure the quantity, color, quality, and spatial distribution of the light emitted by lamps and luminaires. In addition to providing other relevant data such as luminous flux, power consumption, correlated color temperature, and color rendering index, among others. All measurements and calculations performed are compiled in a fully detailed test report.

Asselum has a revolutionary system for measuring color and spectrum at different C and Gamma angles, allowing compliance with the new color measurement standard for SSL. With this system, chromatic aberrations, color dispersion, and various color values such as the color temperature at each Gamma angle can be analyzed in depth.

We provide the photometric files so you can perform your own simulations.

The test provides the following information:

Photometric parameters

  • Luminous flux

  • Efficiency (lm/W)

  • Position of maximum intensity

  • Lamp power (W)

  • Electrical power (W)

  • Glare index D

  • DLOR

  • Spread-throw angles

  • American roadway classification – Type

  • ULOR

  • Luminous intensity class G*

  • BUG

Tables and charts

  • Polar intensity diagram

  • Cartesian intensity diagram

  • Utilization factor

  • Intensity matrix

  • Isolux distribution curve

  • Glare

  • Beam or cone angle

  • TM-15 roadway classification

  • Luminaire Classification
    System (LCS)

Color and spectrum parameters

  • Correlated Color Temperature (CCT)
  • Color rendering index (Ra and R1–14)
  • Chromaticity coordinates x, y and u’, v’
  • Angular color uniformity Δu’v’
  • Du’v’
  • Rf (IES-TM-30)
  • Rg (IES-TM 30)
  • Spectrum 380 nm – 780 nm
  • Spectrum 230 nm – 1000 nm (On request)
  • Spectral index G% of radiance relative to 440 nm
  • % radiance relative to 400 nm
  • % radiance relative to 500 nm

Electrical parameters

  • Voltage (V)

  • Apparent power (VA)

  • Current (A)

  • Power factor

  • Driver efficiency (On request)

  • Harmonics THDi (On request)

Additional parameters

  • Environmental conditions

  • Product image

  • Measurement uncertainties

  • Measuring instruments

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