Overhead Glare and Visual Discomfort

摘要

From the results collected in this study, it is concluded that 1. A luminaire seen at angles of more than 53 degrees from a horizontal line of sight can produce discomfort glare, provided it has a luminance greater than about 16,500 cd/m2. 2. A luminaire outside the field of view can cause discomfort, given that it has a luminance greater than about 16,500 cd/m2, and directly illuminates the whole face. 3. The approximate level of discomfort produced by a luminaire seen between 55 degrees from the line of sight and the edge of the visual field can be predicted using the Unified Glare Rating system. 4. Lighting experts are more sensitive to discomfort glare than office workers naive about lighting.