EVS-EN 12665:2024

EN 12665 defines basic terms and definitions for use in all lighting applications. EN 12665 also sets out a framework for the specification of lighting requirements, giving details of aspects that are to be considered when setting those requirements.

The lighting requirements for a space are determined by the need to provide:

— adequate illumination for safety and movement,
— conditions that will facilitate visual performance and colour perception,
— acceptable visual comfort for the occupants in the space.

The relative importance of these factors will vary for different applications. This basic framework covers aspects in the field of vision, photometry and colourimetry, involving natural and man-made optical radiation over the UV, the visible and the IR regions of the spectrum, and application subjects covering all usages of light, indoors and outdoors, including environmental, energy and sustainability requirements and aesthetics and non-image forming biological aspects.