The Lighting Handbook ZG

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Vydal: ZG Lighting Czech Republic s.r.o

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The result a UGR index. Example: 18.5 (level) but not better than 19. The UGR value calculated with formula. UGR limits (UGRL) that must not be exceeded: ≤ Technical drawing ≤ 19 Reading, writing, training, meetings, computer-based work ≤ Craft and light industries ≤ Heavy industry ≤ Railway platforms, foyers ( ) P2 . The UGR method takes account the brightness walls and ceilings (1) well as all luminaires the system that contribute to the sensation glare (2). It explained the standard 12464-2. The UGR tables are available for each lumi- naire via the respective photometric data sheet: Select product Photometry  Select layout The values are hereby used for classifica- tion glare level. comparison indi­ vidual values does not allow any statement. The UGR limits are specified the EN 12464 standard for activities and visual tasks (see tables pages 31–41). Note: the glare value used outdoors. This takes into account all the luminaires in the system that contribute the impres- sion glare.15 The Lighting Handbook UGR log 0,25 Lb ∑ L2Ω (1) (2) The UGR method The standardised UGR method (unified glare rating) used assess (psychological) glare. Zumtobel quotes both a UGR reference value for reference room and the UGR tables for other room sizes for the majority luminaires its data sheets and their website.0 (same glare level 19). The UGR values for luminaires are determined using the table method pursuant CIE 117