the light output equivalent to a 5-6 W LED, but I measure delivered lamps always by, here I have the biggest difference between the specified electrical and light-moderate existing performance, and determine the power consumption, therefore only one point (Current consumption 90mA at 220V 20W - more heat than light, as with halogen), deviations of up to 50% are common, but 400% is fat, as I said, when the light for 20 watts is going the OK, but is just as attached quake (5W)