I would like to use low energy replacements for 100 watt GLS bulbs but I cannot find anything physically small enough to go into the globe light fittings that we have in the house. The low energy 20 watt mini spirals that claim to be 100 watt GLS equivalents just about fit but they in no way put out as much light. I bought up a supply from Lyco that should last me a while. I suppose I will have to replace the light fittings eventually.
I love the evironmental argument. The GLS bulbs are recyclable. Our council still hasn't made any provision for safe disposal of the low energy bulbs (which are not recyclable, contain mercury and the inside coating of the glass is toxic).
Amazon have lots of light bulbs listed including bulk packs of 100w GLS lamps click here
Like 'peugeot man' I have been using Low Energy lamps for years, especially in places where they are on for long periods. I have a 25w spiral in my standard lamp and 20w in table lamps. If you use them in normal shaded fittings there's little difference in the light and its something you get accustomed to. I have even replaced the expensive cooker hood lamps, which seem to last no time at all, with SES 9w low energy lamps (Tescos) which fit OK and give just as good a light.