UFO High Bay Light HB09 whole lamp output reaches 140lm/W -170lm/W efficacy. In addition, it has the different beam angle 60° 90° 120° for the complex installation surrounds. As we know that the glare can cause health and safety issues and welfare problems such as headaches, migraines and eyesight issues. However our Premier UGR<25, it could reduce discomfort for workers. At last Premier UFO High Bay Light support power from 100w to 240w.