This document has been prepared by Working Committee CEN/TC 169/WG 2 "Lightning of work places" (secretariat: DIN, Germany) of Technical Committee CEN/TC 169 "Light and lighting", the secretariat of which is held by DIN (Germany). The responsible national standardization committee is Working Committee NA 058-00-11 AA "FNL/FGSV 3.02 Außenbeleuchtung" ("FNL/FGSV 3.02 Exterior lightning)") at DIN Standards Committee Lightning Technology (FNL). To enable people to perform outdoor visual tasks efficiently and accurately, especially during the night, adequate and appropriate lighting should 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. This standard specifies requirements for lighting of visual 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. It is important that all requirements of the other clauses of the standard are followed although the specific requirements are tabulated in the schedule of lighting requirements (see Clause 5). This standard specifies lighting requirements for outdoor work places, which meet the needs for visual comfort and performance. All usual visual tasks are considered. This European Standard is not applicable for emergency lighting: see EN 1838 and EN 13032-3. This European Standard does not specify lighting requirements with respect to the safety and health of workers at work and has not been prepared in the field of application of Article 153 of the European treaties, although the lighting requirements, as contained in this standard, usually fulfil requirements with respect to the safety. Lighting requirements with respect to the safety and health of workers at work may be contained in Directives based on Article 153 of the European treaties, in national legislation of member states implementing these directives or in other national legislation of member states. This European Standard neither provides specific solutions, nor restricts the designer's freedom from exploring new techniques nor restricts the use of innovative equipment.