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Photometric laboratory
Professional light measurement according to CIE

LEDs | LED modules | UV LEDs | UV LED modules | Luminaires

Our light laboratory has the latest light measurement technology available for you in accordance with CIE requirements. The measuring devices are specially designed for the light measurement of LEDs. A check of data sheet values for the measurement of LEDs is possible in pulse mode. In addition, LEDs from different manufacturers can be compared. In addition, LED modules and luminaires can also be measured by us via an external partner.

For LEDs, we can measure and evaluate the following parameters during light measurement:

Measurement from UV (350nm), via visible, to IR (1100nm) LEDs.
  • Luminous flux
    Measured in lumen (lm), determines the brightness of a light source in a 3-dimensioned room.
  • Luminous intensity
    Luminous flux/dihedral angle, measured in a candela (cd), indicates how bright a light source illuminates in a certain direction.
  • Efficiency
    Luminous flux/Area, measured in LUX (lx) determines how bright an area is illuminated.
  • CRI | TM30
    Color rendering index describing the quality of color reproduction of light sources of the same correlated color temperature.
  • Colour temperature
    CCT / Measured in Kelvin, gives the color impression of the light again from cold white to warm white
  • Chromaticity coordinate
    x, y coordinates determine the position of the color temperature in the CIE -XYZ color space
  • Wavelength
    The wavelengths of visible light, lies between 380nm and 780nm.
  • Spectrum
    Weighted distribution of light over the wavelength range of the total electromagnetic radiation
  • Photosynthetic Photon Flux (PPF)
    Measures the number of photons emitted per second that can be used by plants for photosynthesis.
Photometric laboratory: Spectral light distribution Spectral light distribution
Photometric laboratory: Spectra Spectra

For UV LEDs, the following parameters can also be measured and evaluated by us:

Measurement from UV (200nm), via visible, to IR (1100nm) LEDs.
  • Wavelength (nm)
    The measuring range includes the UV range from 200nmand extends into the IR range up to 1.100nm.
  • Spectrum
    Spectral software for colorimetry, radiometric and effect measurements.
  • Transmission-Reflexion
    Measures the transmittance of a medium for light waves as well as its reflected light waves.

For LED modules and luminaires, we can perform the following light measurements via an external partner:

Measurement from 200nm to 3000nm
  • Photometry
    • Photometric measurements on LED modules and luminaires
    • Luminous flux measurements on LED modules and luminaires
    • Creation of 3D luminous intensity distributions (LVK) Formats: LDT/IES
    • Conversion of photometric data formats: LDT/IES
    • Determination of gross/net luminous fluxes of LED luminaires
    • Determination of various photometric parameters such as: Luminous efficacy, efficiency, UGR values, luminance, luminous intensity, beam angle, zonal luminous flux, most similar color temperature (CCT), color coordinates, color rendering index (CRI).
    • Temperature-dependent measurement of photometric and colorimetric parameters on LED modules
    • Measurement of spatial luminous intensity distribution according to EN 13032 and LM-79-08
    • Measurement of absolute luminous fluxes according to EN 13032
    • Determination of the energy efficiency class of lamps and luminaires in terms of the Ecodesign Directive 2009/125/EC, VO 1194/2012 and VO 874/2012
  • Spectrometry
    • Measurement of spectral light distribution 380 - 800nm
    • Testing of photobiological safety according to DIN EN 62471
    • Spectral measurements in the range 200 - 3000nm
    • Radiance measurements
    • Measurement of Photosynthetically Active Radiation 400-700nm in Plant Light (PAR, PPF, PPFD)
    • Irradiance measurements
  • EMC measurements
    • Emission (interference emission)
    • Immunity (interference resistance)
  • Flicker measurements
    • Determination of flicker frequency, flicker percentage, flicker index on LED modules and luminaires

Light measurement technology

Ulbricht sphere Photometric laboratory: Ulbricht sphere
  • Light- and radiation-measuring device for measurement of luminous intensity in cd or mW/sr, according to requirements after CIE127
Spectroradiometer Photometric laboratory: Spectroradiometer
  • CCD Array 1024 x 128
  • Range of wavelength-measurement: 350 - 1100nm (UV- / vis- / IR-range)
  • Integration time 9ms - 60s
  • Measurement parameters: Color coordinates (x, y / u′, v′), Color temperature, CRI; Ra, Ri; i= 1 - 14, Relative spectral light distribution P (λ), Luminous flux, Luminous power
UV Spectroradiometer Photometric laboratory: UV Spectroradiometer
  • Wavelength measuring range: 200nm to 1,100nm
  • Spectral software for color measurement, radiometric and effect-related measurements
  • Transmission measurements
Any questions?
We are happy to answer your questions and advise you with our many years of experience in choosing the right package.
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