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Photometric measurements

In our in-house light laboratory, we measure luminaires with a modern far-field goniometer - also as a service for you. The digital light distribution curves created in this way in all common file formats enable light planners to take our lights into account in light calculations. The measurement data also provide important information for sales and conclusions for the further development and improvement of your lights.


The FLASHAAR light laboratory is equipped with a 2-axis far-field goniometer that measures luminaires with a total length of up to 1,500 mm and a maximum weight of 25 kg. All lights are measured at a stable operating temperature, with a stable luminous flux and the highest resolution.

The light laboratory is also equipped with a special laboratory power pack for the precise electrical measurement of LED lamps in particular. Constant voltage and constant current LEDs can thus be measured with high accuracy, as an alternative to the built-in AC power supply. An additional electronic ballast is not necessary.


Technical data of the far-field goniometer:

  • Sensor distance: 0.5 - 50 m
  • Measuring range: 10lm - 1,000,000lm
  • Goniometer resolution: 51,200 steps / 360 degrees
  • Spectral range: 360-830 nm (1,024 pixels) SONY ILX511B
  • Lumen accuracy: < 4%
  • Export: IES, LDT, PDF, Excel
  • Power Analyzer for detailed analysis of electrical power
  • Detailed view of shades R1-R15
  • Maximum lamp connection power 660W at 220V or 330W at 110V

The following measurement data are determined:

  • luminous flux [lumen]
  • Max. Luminous Intensity [Peak Candela]
  • Color temperature [Kelvin]
  • Color Spectrum [CIE1931, TM30 C values, CRI, CQS, CRI R values, CQs Q values]
  • ISO candela diagram
  • ISO lux diagram
  • Luminous intensity distribution [LVK]
  • beam angle
  • Electrical consumption [W]
  • Efficiency [lm/W, calculated]
  • Warm-up curve lamp (time, CCT start, CCT change, CCT end)
  • UGR table
  • Flicker percentage
  • flicker index
  • flicker frequency
  • SVM index
color location
chroma shift
Tm30 details


We deliver the measurement results summarized in a PDF overview , as well as all measurement data in a *.LDT and *.IES file. In the LDT file you will find all the information about the luminaire, lamp, luminous intensity and light distribution. The measurement data can be visualized, for example, with the LDT Editor from DIAL as a polar diagram, Cartesian diagram, cone diagram and UGR table.

Renderings of the light distribution can be created from the IES file, for example with the IES Viewer .

We would be happy to create an individual offer for you, tailored to your lights, requirements and order quantities. Contact us by email , by phone at 06721-91950 or use our contact page.


flicker measurement

In our light laboratory, we also measure the flicker of lamps. Our flicker meter provides information about the flicker percentage, the flicker index and the frequency as well as the SVM index (stroboscopic effect visibility measure).

For our own lights, we use the flicker measuring device for continuous quality assurance and as a supplement to our 2-axis far-field goniometer. We would be happy to measure your lights as a service - talk to us! You will receive the data from the photogoniometer and flicker measurement in a complete test report in PDF format, with your logo if you wish. The costs for measuring the flicker percentage %, flicker index, frequency and SVM index are €99 net.