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UGR is short for Unified Glare Rating, UGR is a psychological parameter to measure the subjective response to the the human eyes' discomfort which is caused by the light emitted from the lighting device in indoor visual environment. Its value can be calculated with CIE uniform glare value formula according to specified computational conditions. Different UGR values lead to significant differences of lighting effects, which consequently causes huge visual and psychological differences. It can be used in various places and details are as follows:
1. UGR=13, just feel glare, light screen is less reflective, space of ceiling is dark, and the feeling is gloomy; generally used for computer room, monitoring room;
2. 16 < UGR < 19, just acceptable limit for the comfort and discomfort, limited control glare, reflective of light screen, and it is the comfortable choice for office space; generally used for ordinary, high-grade office, a library reading room, hospitals, schools and other buildings;
3. UGR > 19, just uncomfortable, vibrant lighting space, but the glare of light screen reflecting the introduction of care; general used for commercial buildings, business offices and the like.