Luminaire blue light hazard spectroradiometer

ISR300-PSL from Bentham

The ISR300-PSL is a key tool in the accurate evaluation of blue light hazard across all classes of lighting products.

CE marking of luminaires against the EU low voltage directive 2014/35/EU requires implementation of EN 60598-1 according to which blue light hazard should be assessed with reference to IEC TR 62778.

The ISR300-PSL offers the luminaire manufacturer the most reliable and accurate direct assessment of blue light hazard, devoid of overly conservative assessment results caused by employing an approach based on calculation and estimation. 

  • High accuracy telespectroradiometer
  • Direct determination of blue light radiance in 11mrad field of view
  • Calibrated spectral radiance standard traceable to PTB, Germany
  • Fully automated over USB 2.0 with BenWin+ spectral acquisition software
  • Software guidance, calculation and report generation with PSL Wizard application

Further information

Core benefits

  • Direct approach to blue light hazard testing
  • Assess all classes of lighting product
  • No dark room or knowledge of standards required
  • A key tool in designing lighting products for compliance

Reported parameters

  • Spatially-averaged spectral radiance
  • Spatially-averaged blue light radiance
  • Threshold illuminance, Ethr
  • Threshold distance, dthr 



Spectral range of operation

300-780 nm

Spectral data interval

5 nm

Spectral bandwidth (FWHM)

5 nm

Wavelength accuracy

± 0.3 nm

Wavelength reproducibility

± 0.05 nm

Stray light rejection at 2.5 FWHM



Multi-alkali PMT and Silicon photodiode

Photo-current measurement

Dual-channel six decade picoammeter

Measured quantity

Spectral radiance

Minimum measurement distance

200 mm

Maximum measurement distance

>10 m

Fields of view

11, 5 and 1.7 mrad

Range of blue light radiance (typ.)


System requirements

Bench space

0.5x 0.5 m not including working space for computer and luminaire under test


  • IEC TR 62778, “Application of IEC 62471 for the assessment of blue light hazard to light sources and luminaires”
  • EN 60598-1:2015, "Luminaires - Part 1: General requirements and tests"
  • IEC 62471:2006, "Photobiological safety of lamps and lamp systems"
  • EN 62471:2008, Photobiological safety of lamps and lamp systems
  • EU Low Voltage Directive, 2014/35/EU


B-ISR300-PSL Blue light hazard


Staffan Eriksson
Staffan Eriksson

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Quantum Design GmbH

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SE 182 35 Danderyd

Phone:+46 8 41071791
Staffan ErikssonSales Manager
+46 8 410 71791
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