nkSRPS CEN/TS 18182:2025

Light and lighting - Assessment of obtrusive electrical light in outdoor spaces

Scope

This document prescribes calculation and verification methods for evaluating scattered luminous flux (obtrusive light) coming from the electric light sources of lighting installations in public and non-public outdoor spaces, in the following application areas:

- lighting installations in outdoor workplaces;
- road lighting installations;
- lighting installations for outdoor sports fields and areas;
- monument and architectural lighting installations;
- lighting installations for the outdoor areas of residential buildings;
- lighting installations for the outdoor areas of parks and gardens.

NOTE: for some of these application areas lighting application standards are already available.

This document also considers luminous signs and luminous advertising installations in outdoor areas and the light emission scattered by illuminated environments covered by translucent surfaces.

This document also considers the spectral composition of light concerned and glare.

The calculation methods described are intended as an integral part of the lighting design and are suitable for evaluating consistency with any regulatory conditions.

Due to the complexity of the phenomena and the numerous alteration factors, this document does not consider the influence of atmospheric conditions in evaluating obtrusive light.

This document does not apply to lighting installations for tunnels and underpasses, to all signalling devices such as traffic lights, active road signs and the like, to vehicle headlamps or to interior light emitted from windows, skylights and shop windows.

This document additionally considers the spectral composition of the light concerned, as well as the room brightening at building openings not intentionally lighted in the above application area and the glare effect.