Human Centric Light Measurement

Human Centric Light Measurement


Ultraviolet radiation is a leading source of photobiological hazards. Exposure to visible light, particularly blue light, and infrared radiation can be harmful to human eyes and skin. We provide laboratory-grade solutions to enable accurate photobiological safety assessment for lamp manufacturers, photometric laboratories and Health and Safety professionals.

International standards and legislation require light manufacturers to inform users about the photobiological safety risks connected with using their products. This information is particularly relevant to employers who are obliged to abide by legislation regarding light quality in the work place.

To support lighting manufacturers and photometric laboratories with photobiological safety assessment in accordance with international standards, we provide solutions to simplify hazard measurement.


Our blue light hazard measurement system provides user support throughout the complete measurement process. It obtains dependable data and presents instant results which declare the risk group for LED and other lighting products: RG 0 – risk free group all the way to RG 3 – high risk group.


Blue light hazard measurement is a intricate metro-logical task and requires specialised instrumentation. Our easy-to-use instruments enable faster product tests and measurements, reducing – or even eradicating – reliance on external photometric laboratory services.


The Spectis 5.0 Touch is a specifically calibrated, high-resolution spectroradiometer. Optical probes for blue light irradiance (Eb) and blue light radiance (Lb) are available to measure skin and eye safety. Factory calibration includes nonlinearity, wavelength, stray light rejection and absolute spectral calibration.




  • Lamp manufacturers – for evaluation of blue light hazards in standards compliance testing procedures
  • Photometric laboratories – that want to extend their photobiological safety measurement services
  • Health and Safety professionals and scientists – who have a need for optical radiation measurement, such as onsite risk evaluation of industrial processes


Producing human centric lighting involves the assessment of photobiological safety, for which it is necessary to perform spectroradiometric measurements across a broad spectral range. This requires specially calibrated measurement equipment. Irradiance, effective irradiance and effective radiance must all be measured to be able to identify all the hazards to eyes and skin.

Blue Light Hazard Measurement (300 – 700nm)

The GL Spectis 5.0 Touch is specially calibrated for accurate data from an extended visual spectral range of 200 – 1050 nm, where dangerous blue light is present between 300 and 700 nm. The Spectrosoft Analysis software has an in-built Blue Light Hazard Wizard to guide the operator through a step-by-step measurement procedure for identification of risk group classification.

Effective Values

GL Spectrosoft is a dedicated software for GL Spectis Spectrometers that calculates effective irradiance values: EB, EBK, ES, EUVA, EUV, EIR Eskin and effective radiance values such as: LB, LIRA, and LVISIRA. It calculates and presents data in easy-to-ready charts and tables as well as generating RTF reports. Options for calculations concerning photobiological safety are available under the LAB license or Spectrosoft PRO licence with the photobiological safety add-on.

Radiance and Irradiance

For irradiance measurements we offer the Opti Probe 5.1.50. When using this probe in connection with the spectroradiometer, the effective quantities are calculated from irradiance values. This optical probe uses a silica glass diffuser and high-quality quartz glass fibre optics for high precision and transmission properties.

For radiance measurements we recommend the GL Radiance Telescope, which is an optical probe conforming to international standards with regard to the steradian/solid angle resolution and extended spectral range transmittance.


Browse Products

All of the below products can be integrated into a tailored Photobiological Safety Assessment Solution


The Spectis 5.0 Touch is a laboratory grade, self-contained smart spectrometer.

  • Includes factory calibration in extended range from 200-800nm
  • Ready for connection to dedicated optical probes or accessories
  • Use as a standalone device or connected with a PC


A Cosine corrected optical probe for irradiance measurement.

  • Class A cosine correction for lab accuracy spectral irradiance
  • Extended spectral sensitivity with the silica glass diffuser
  • Fibre optic with precise adapter connection to spectroradiometer

*Factory calibration included


Dedicated optical probe for spectral radiance measurement 300-1400nm.

  • High quality optical components for UV-VIS NIR measurements
  • Precisely designed optical system conforming to international standard requirements
  • Fibre optic with precise adapter connection to spectroradiometer

*Factory calibration included


An advanced analysis tool for focusing on detailed spectral analysis.

  • Dedicated blue light hazard wizard for lamp classification
  • Calculation of effective values in compliance with international standards
  • Implemented effective spectral curves

Can’t find what you’re looking for?

Call +44(0)1954 232 776 or email to discuss your requirements with a Light Measurement Specialist.


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