Environmental,ultra-thin 10mm,New aluminum frame,Luminous efficiency of up to 90Lm/W,CRI>80. Environmentally ... school and hospital,factory lighting.Mechanical Specifications:Main material:aluminum frame,LED,LGP,power supply. No harmful rays,infrared and ultraviolet ... additional 15%,some power.Tolerance range for optical and electrical data: ±10%. New aluminum frame,ultra-thin 10mm,no screws on the back ...