Energy Saving Lightbulb Query

[Moose]

Wattage is a measure of the amount of power consumed by the appliance, not the amount of light emitted. So a 25W energy saver will emit the same amount of light as an incandescent bulb that draws 100W.

The first bit is exactly right, however the second bit might not be true.

The 'amount of light' emitted by any lamp should be measured in lumens or lumens/watt.

eg A 100w incandescent lamp is in the region of 1700 lumens (17 lumens/watt). If an energy saving lamp emits 40 lumens/watt the 'amount of light will be 1000 lumens and therefore not as 'bright'. If it emits 80 lumens/watt (2000 lumens) then it will be 'brighter'.