Philips InstantFit T8 LED Tube Light Bulb Life: 32.9-years (based on 3-hours/day) Light appearance: 4000K (cool white) Energy used: 17-Watt (equivalent to a 32-Watt linear fluorescent light bulb) Uses 55% less energy compared to a linear fluorescent light bulb Estimated yearly energy cost: $2.05 (based on 3-hours/day, 11/kWh, costs depend on rates and use)