I have an LED T8 tube, 1.2m, on 240VAC it draws about 80mA and it has 18W. I do have compared it with a 1.2m fluorescent T8 tube, 36W plus ballast which has on 240 VAC 400mA. The current I have measured with an AC multimeter. Means the LED light saves 5 times the power. If I compare the 18W to 36W plus ballast (around 8W). I have measured this with a Watt-meter. So my question is : On the electric bill, do i save half the money or do I save about 5 times the money ? Thanks for lighten me up.