PS UGR Diffuser

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