With the improvement of the quality of life, people are increasingly pursuing a more comfortable and friendly living environment. The lighting industry is also facing the comfort from the previous attention to the brightness and now more and more attention to lighting, thus promoting friendly, environmentally friendly lighting. Development and application, where UGR<19 is a psychological parameter of the subjective response of the light emitted by the illumination device to the human eye causing comfort and discomfort. China Acrylic Sheet Factory has been operating optical materials for many years. Now combined with its experience and knowledge, it has compiled relevant knowledge about UGR. First, the UGR definition UGR is the abbreviation of Unified Glare Rating, which means uniform glare value. It is a psychological parameter that measures the subjective reaction of the light emitted by the illumination device in the indoor visual environment to the hum...