The Lighting Handbook ZG

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Vydal: ZG Lighting Czech Republic s.r.o

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New quality criteria – Changing lighting situations – Personal control – Energy efficiency – Daylight integration – Light interior design element Maintenance factor The initial value multiplied the mainte- nance factor gives the illuminance maintenance value. Visual task area Illuminance levels are specified for specific visual tasks and are designed for the area in which these may take place. Quality characteristics lighting . The maintenance factor can determined individually, and takes the installation’s reduction luminous flux caused soiling and ageing lamps, luminaires and room surfaces into account. If the exact location unknown, the room as whole defined area the work­ station used for specification. The visual task area may horizontal, vertical inclined plane. Uniformity UO In order perform visual tasks illuminated areas, there should not any great differ- ences brightness that uniformity should not fall below Emin/Ē. 300 500 lx). The maintenance schedule (the cleaning and maintenance intervals for the lamps and installation) must documented. Area immediately surrounding the visual task area Here illuminance may one level lower than in the visual task area (e.12 The Lighting Handbook The right light traditional and new quality criteria Illuminance definition terminology Traditional quality criteria – Sufficient illumination level – Harmonious brightness distribution – Glare limitation – Avoidance reflections – Good modelling – Correct light colour – Appropriate colour rendering Illuminance maintenance value Ēm Value below which the illuminance level must not fall the visual task area. See also Section Checklists.g