BS EN 12464-2:2007
Lighting of work places. Outdoor work places
BS EN 12464-2 is the standard that focuses on the recommendations for outdoor work places that are used at night. BS EN 12464-2 includes important recommendations on how obtrusive light can be limited, to keep our night sky free of light pollution.
Part 2 of BS EN 12464 provides the lighting design criteria for 15 installation task groups and 97 task activities. It also defines the maintenance, energy efficiency and system verification procedures. BS EN 12464 is essential reference for all lighting designers and users.
To enable people to perform outdoor visual tasks efficiently and accurately, especially during the night, adequate and appropriate lighting has to be provided.
The degree of visibility and comfort required in a wide range of outdoor work places is governed by the type and duration of activity.
BS EN 12464-2 is the standard that specifies the requirements for lighting of tasks in most outdoor work places and their associated areas in terms of quantity and quality of illumination.
In addition recommendations are given for good lighting practice. Lighting requirements for outdoor work places are specified to meet the needs for visual comfort and performance and all usual visual tasks are considered.
The BS EN 12464-2 standard provides guidance rather than specific solutions, and so the designer will have free choice to explore new techniques and use innovative equipment.
Contents of BS EN 12464-2 include:
Scope
Normative references
Terms and definitions
Lighting design criteria
Luminous environment and distribution
Illuminance on the task area and surroundings
Illuminance grid
Uniformity and diversity
Glare rating
Veiling reflections and reflected glare
Obtrusive light
Directional lighting
Modelling
Directional lighting of visual tasks
Colour aspects, appearance and rendering
Flicker and stroboscopic effects
Maintenance factor (MF)
Energy considerations
Sustainability
Emergency lighting
Schedule of lighting requirements
The schedule of areas, tasks and activities
Lighting requirements for areas, tasks and activities
Verification procedures
Colour Rendering Index
Obtrusive light
Lighting requirements for safety and security
Bibliography