EVS-EN 13201-3:2015

This European Standard defines and describes the conventions and mathematical procedures to be adopted in calculating the photometric performance of road lighting installations designed in accordance with the parameters described in EN 13201-2 to ensure that every lighting calculation is based on the same mathematical principles. The design procedure of a lighting installation requires also the knowledge of the parameters involved in the described model, their tolerances and variability. These aspects are not considered in this part of the standard but a procedure to analyse their contribution in the expected results is suggested in part 4 and it can be used in the design phase too.