Energy saving lightbulbs?

Jeff Howell (not on the Telegraph's site yet) talks this week about energy saving lightbulbs.

He comments that -

• They lose light intensity after a few months
  
  
• The waste heat from standard bulbs warms the room, which in winter should reduce the load on thermostatically controlled central heating
  
  
• They contain mercury [will this still be legal under EU rules?] so they have to be disposed of as hazardous waste (adding to costs) and not dumped in landfill, where they might contaminate the groundwater.

He discusses some numbers and concludes that "the energy saving is, at best, marginal".

Was it David Miliband who suggested a tax on standard lightbulbs?