... 2.Material:aluminum+PC cover E27 High Quality Aluminum Module Led Bulb 9w Led Bulb Specifications:1,Material: aluminum+PC cover2 ... IR radiation 4,Long lifespan can reach 50000h5,Different color temperature for your choice, warm white:3000-3500K, ... Aluminum +PCcoverOperating temperature -20°c - +40 °c Color Rendering Index >80RaLed Bulb Application:Super market, Office, meeting room, showroom, classroom ...