As the development of LED technology, the radiance of LED chip increase dramatically, the beam angle gets more narrower and narrower, The wide application of LED ultravilet and blue laser has caused the harm of radiation be a problem that cannot be ignored, it will have a influence in health of our eyes. Hence, many companies will adopt different solutions to reduce the UGR to make it more comfortable.
UGR (Unified Glare Rating) is a calculation method that helps lighting designers create schemes to avoid the discomfort of misplaced light, it is an indicative rating for glare based on prescribed set of circumstances in a lit environment. Glare sources within a typical field of vision on the lit environment can be numerous.
For low UGR LED products, the UGR19 panel light is widely be used for office lighting. Usually manufacturers will adopt below solutions to reach the UGR19.
- The common one is adopting the prismatic diffuser
- Adopt America Bright View UGR diffuser, but price will be high
- Louver design with reflector to replace the diffuser
- If above solutions still cannot reach UGR ＜19 successfully, reduce the total lumen output
In the market, many clients are requiring UGR19 panel light, but different clients have different standards on UGR, most of clients only require the first value of 4H/8H at 70/50/20 should ＜19, or the 3rd value for 4H/3H should ＜19, adopt the Anti-glare diffuser is enough.
Some clients require all value on UGR table should ＜19 for some office lighting or school with high request, anti-glare diffuser will be very difficult to reach it, should try to reduce the total lumen, or adopt the louver design.
Some clients will have a question is there a specific or official standard on UGR ? Actually the current answer is no. We checked it with some international testing Lab, such as TUV and DEKRA, they have different answers, TUV require all value should below 19, DEKRA only consider the first value of 4H/8H. Also we find some branded companies, they will remark the details as below ：
Whatever any UGR value you prefer, kindly please advise us in details, we will provide suitable solutions to fully meet your request.
