... °C)Advantages of LED tube *Wide beam angle 270 degree* High quality material make it super long life time, up to 50000hrs ... 36W, but because access to the electromagnetic ballast, the measured input power is 42.4w, that is, iron-core inductor loss ... usually up to 90%, a 18w led fluorescent lamp 20w input power. The power factor can also be above 0.9 ...