... buzzing noise 2.Long ligetime 50,000hrs 3.easy installation 4.No flickering HM-LED 600*600 36W led panel light ... 80LM/W, CRI90 65LM/W 3. 0-10V, DALI, Switch Dimmable 4. 5-year warrantyFace Light Technolodgy:- Uniform illuminated surface, Uniformity>90 ... Energy Star standard and LM80 test- 0-10V, Dali or Switch Dimmable- Very slim (1.75cm thick) for use in limited ...