Impact of the New CEN Minimum Illuminance Criterion on the Working Plane Size

Abstract

The aim of this study is to present a comparison of daylight evaluation after requirements of Slovak standard STN 73 0580 and after the new CEN criterion 300 lux median diffuse horizontal illuminance in three rooms with different plans and different size of windows. Minimum values of illuminance in lux calculated on the border of the working plane were investigated. This study shows how this new CEN criterion influences the length of working plane and size of its part usable for performance of visual tasks.