SSL Resource
Photometric Testing Efficiency

Signal measurements  - standard-based and trustworthy

We can test various signaling devices for their compliance of required certificates. The calibration/measurement reports are traceable to the National Metrology Institute of Finland and USA, MIKES and NIST.

Here are some examples of measurement standards that we have measured. If you can not find what you are looking for, please send your testing standard to us here so we can possibly provide test services for your products as well. 

Optical Tests of Variable Message Traffic Signs (VMS)

With our goniometer type B connected to class L photometer and spectrometer, we can measure all the parameters of the VMS products according to EN 12966-1 standard including 

Variable Speed Limit
Variable Speed Limit
  • Luminance
  • Luminance Ratio
  • Beam Width
  • Uniformity
  • Color Class

Our external light source produces all required illuminance levels 4 - 40 000 lx in both illumination angles of 5 and 10 degrees. For very large samples (depends on the off-axis dimensions and weight), we use a goniometer of type C.


The measurement prices are determined by the type, size and order-specific amount of the products to be measured.


What do you need to measure?Our photometric experts at your service

Measurement of Signaling and Warning Lights

The standard ECE R 65 requires the measurements of the beam width and the pulse form factors of signaling and warning lights. With our goniometer and flicker meter SSL L-200 we can measure them both thus verifying the accordance of the light source to the standard.

Optical tests of Marker and tail lamps

The standard EN 15153-1:2013 sets requirements on the signal lights used in trains. The lights need to have their angular luminous intensities within certain range as well as the color of the light in allowed color coordinate region.

Optical testing of signal or warning lights needed?

Signal light measurement for trains

Train signal lights are measured according to standard EN 15153-1: 2013. It requires that the angular distribution of the luminous intensity must be within certain limits, as well as the color coordinate areas for the light color. We test these with our C-type goniospectrophotometer.

Ask more of our measurement services!


Measurement facilities are traceable to the Finnish and US National Metrology Institutes MIKES and NIST.