Tristimulus colorimeters and spectroradiometers are used for color measurement of light sources, e.g. lamps, luminaires, light signals, flares, monitors, displays, glasses and filters. They can be used as stand-alone instruments or in combination with goniophotometers and integrating spheres.


Very fine adopted tristimulus colorimeters for colour measurement of lighting devices, e.g. light sources, road illumination, signals, flashes and flares.

Tristimulus colorimeters integrate the CIE 1931 standard observer colour matching functions acc. to DIN 5033-6 and ISO-CIE 11664-3:2019. LMT Mosaic Filtering® assures lowest measurement uncertainty of chromaticity.

Spectroradiometers for Automotive Lighting

Application tailored spectroradiometers are required for specific radiometric measurements in automotive lighting, for instance UV and red content.

Spectroradiometers for General Lighting

Application tailored spectroradiometers are required for general lighting colour measurement and colour rendering.


All LMT photocurrent meters may be equipped with a radiometer head specialised to cover a dedicated wavelength range, for instance for IR or UV applications.