Classification system for lighting design under condition of mesopic photometry

However, recommended system for mesopic photometry was already stated in 2010 a lot of issues are still open to solve them with respect to assessment of the adaptation luminance which is required for the computation or determination of the mesopic photometric quantity for example luminance or illuminance. This is mainly dependent on visual field of observer and also value of this photometric quantity is different for various situations in scene of the visual field of observer. Especially it can be shown that in outdoor lighting system applications is determination of the adaptation luminance critical depending on situations on the illuminated area. For these measurements are appropriate image photometers which are able to provide full information about spread of luminance in the picture. Data from image are valuable for investigation of adaptation luminance in detail. The paper deals with various situations which occur on the road under public lighting to investigate of possibility of assessment of adaptation luminance from images provided by the measurement with the image photometer. The results can be used for creation of appropriate classification system for practice and lighting designer to allow calculation of the photometric parameters at roadlighting design.