The government wants your old-fashioned energy-hungry incandescent tungsten light bulb gone, and gone soon. But some people are willing to go to great lengths to hang onto the lights they love.

Incandescent bulbs - that's the traditional kind to you or me - waste 95% of the energy they use, according to Greenpeace. They calculate that phasing them out in the UK will save more than five million tonnes in CO2 emissions a year.

And yet some households are so attached to them that they not only keep buying them - they're stockpiling them ahead of the day when they're no longer available.

In September last year, the UK government made a deal with major shops for the supply of traditional bulbs to be turned off. Some higher energy bulbs will be gone by January 2009, and all incandescent lights will be off by 2011.

The agreement is voluntary, but other countries have announced legal bans, including Ireland, Australia, New Zealand and the US.

The brighter bulbs are already fading from view, according to Glen Gotten of the light merchant Ryness. "100w and 150w are difficult to get hold of," he says. "The larger manufacturers have stopped making them. We still manage to get enough to supply our customers for now, but they will start drying up."

The 150w, in particular, is seriously rare. They're gone from Tesco. Morrisons have already chosen to ditch them, with 100w to follow in the autumn and 60w next year.

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