Easy Installation Step1. Cut off the power supply. Step2. Remove the lamp socket(s) and BALLAST. Step3. Choose one installation method suitable for your fixture. Dome(not for 3 inch light engine), junctionbox or surface mounting. Step4. Connect wires, white to white, black to black and ground to ground. Much more detailed installation information could be found on user manual comes with each item. Long LifespanSilverlite LED light engine is rated at 40,000 hours. It is 4x longer than CFLs(10,000hours) and much longer than incandescents, meaning far fewer service cycles and far fewer replacement bulbs. Excellent Heat ManagementBacked with a tough steel heat sink, Silverlite LED light engine has better performance in heat dissipation, which allows delivers longer life than other LED module. Rugged design bulid to last. 5year Limited Silverlite LED light engine backed up a 5year limited from the purchase day, ing the need for minimal servies or replacements. Totally Flicker FreeFlciker Rate High CRIWith 80+ CRI, Silverlite LED light engine bring you into a vivid world. UL ClassifiedSilverlite LED light engine are UL approved for use in luminaires and suitable for damp location where not in direct contact with weather and water, can be used in bathroom. [High Brightness & Energy Saving] – Delivering 3500LM at 5000K daylight, this 40W LED module replaces 150W incandescent, saving up to 80% on energy bills. UL/ES/JA8 certified for safety and efficiency. UPC 784115936514 Color 5000K Shape Rectangular Voltage 120 Volts Bulb Base E26 Brand Name Silverlite Style Name 8.5 5000K Unit Count 1.0 Count Finish Types Unfinished Manufacturer Slite Electrical Supply Model Number E8.5RLE50120DDH Power Source Corded Electric Material Type Alloy Steel Mounting Type Ceiling Mount,Surface Shade Material Alloy Steel Color Temperature 5000 Kelvin Light Source Type LED Included Components BULB Light Source Wattage 40 Watts Batteries are Included No Number of Light Sources 1 Item Dimensions L x W x H 8.78 L x 8.78 W x 1.1 H Light Source Special Features dimmable, high CRI Manufacturer Warranty Description 5 years warranty. Maximum Compatible Light Source Wattage 40 Watts