Ergonomics. Accessible design. Specification of age-related luminance contrast for coloured light Ingestion-build-64721 fitting or flange to regulate

fitting or flange to regulate the flow of liquid or gas within a system

capable of making

normally comprising a seal and a gland or a composite seal/gland device

The stage at which this guide is intended for use is after initial planning considerations pertaining to the development of the site have been applied

Ergonomics. Accessible design. Specification of age-related luminance contrast for coloured light Ingestion-build-64721 fitting or flange to regulate1 Scope This International Standard specifies the age related luminance contrast of any two lights of different colour seen by a person at any age, by taking into account the age related change of spectral luminous efficiency of the eye. This International Standard provides a basic method of calculation that can be applied to the design of lighting, visual signs and displays. It applies to light, self luminous or reflected, in visual signs and