The Lighting Handbook ZG

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This takes into account all the luminaires in the system that contribute the impres- sion glare. 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 limits are specified the EN 12464 standard for activities and visual tasks (see tables pages 31–41). Note: the glare value used outdoors.0 (same glare level 19). The result a UGR index. The UGR values for luminaires are determined using the table method pursuant CIE 117.15 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. Example: 18. It explained the standard 12464-2. comparison indi­ vidual values does not allow any statement.5 (level) but not better than 19. The UGR value calculated with formula. 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. The UGR method takes account the brightness walls and ceilings (1) well as all luminaires the system that contribute to the sensation glare (2)