BT10-CW174 LED, 2FT, INPUT 9W OUTPUT 25W INPUT 9W OUTPUT 20W Voltage: 85V-285V, World Bulb Frequency: 50/60 Hz Saves 90% of equivalent conventional bulb and lasts about 21 years. These LED tubes fit into a T8 or T10 fluorescent fixture. The brightness is similar to a 40W T8 or T10 tube, but ours uses 14W of electricity. You save 26W per tube. Multiply that with every fluorescent light in your building and the kW savings is staggering! We can offer a beautiful warm white color that will be almost the same as an incandescent (Edison) bulb. These tubes will last about 17 years if used 8 hours per day.