2. The multiple of the luminaire height above the observer’s eye is determined L = 14 m /1,8 m = 7,8 H and B = 7,5 m /1,8 m = 4,2 H using the room dimensions (example: room length L = 14,0 m, room width B = 7,5 m). 3. The luminaires are mounted parallel to the longer room side (see sketch 1). UGR values can be gathered from the luminaire-specific UGR table for the applicable reflectance values of ceiling, walls and floor (in the example 0,7, 0,5, 0,2) according to the following reading rule 1 (see also table) with interim values to be interpolated as necessary:
Table 3.6 The values are highlighted with |..| in table 4. In some cases, the UGR values must be corrected regarding lamp luminous flux or other luminaire data.
