Outside Diameter: 115mm / 4.5inch Lumen: 2000Lm for 150 Square Feet room Input AC120V 50/60Hz Light temperature : 6000K - 4500K - 3000K Packing 1x led ceiling fan light retrofit panel with driver on the panel. 1x Connector 3x Big Magnets Easy Installation Step1. Cut off the power supply. Step2. Remove the light source and BALLAST . Step3. Choose one method suitable for your fixture.(with magnets or screws) Step4. Connect wires, positive to positive and negative to negative. User's Guide Intelligent Color Temperature Setting 1)Select the color by a quick switch,the first time you turn on the light -white light ,the second time -warm light ,the third time - neutral light . 2)Once you get the color , let it stay for at least 6.5 seconds then turn off it. Do not turn on the light immediately after turning off the light, as it also takes 6.5 seconds to remember the color you selected. After 6.5 seconds or more you will find that it will be the color temperature you selected last time. 3)If you have more than two this ceiling fan lights and you need the same color temperature, you only need to quickly switch on and off 7 times in 10 seconds, and then all the lights will synchronize a color temperature.