CIE DIS 027:2021
Photometry of road illumination devices, light signalling devices and retroreflective devices for road vehicles
Report / Survey by Commission Internationale de L'Eclairage, 2021
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This standard specifies the requirements for measurement of electrical, photometric, colorimetric and retroreflective properties of road illumination devices, light-signalling devices and retroreflective devices for road vehicles including their light sources as given by various UN regulations. These properties are usually acquired with a DC supply voltage, possibly supplied by an associated light source control gear.
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