The Lighting Handbook ZG

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Vydal: ZG Lighting Czech Republic s.r.o

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The UGR values for luminaires are determined using the table method pursuant CIE 117.0 (same glare level 19). It explained the standard 12464-2. This takes into account all the luminaires in the system that contribute the impres- sion glare. The result a UGR index. The UGR value calculated with formula. comparison indi­ vidual values does not allow any statement. 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. The UGR limits are specified the EN 12464 standard for activities and visual tasks (see tables pages 31–41).5 (level) but not better than 19.15 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. Note: the glare value used outdoors. The UGR method takes account the brightness walls and ceilings (1) well as all luminaires the system that contribute to the sensation glare (2). 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 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