It's being reported that shop shelves are being emptied of traditional light bulbs as UK consumers stock up.

The incandescent 100W bulbs are do be replaced by greener, low-energy alternatives as part of an EU agreement that Britain signed up to in order to meet climate change targets.

An energy efficient bulb uses a fifth of the energy of a conventional bulb, but despite this money- and power-saving fact, UK consumers are panic buying to get the older type.

John Lewis, Asda and Homebase have completely sold out of 100W bulbs, while Sainsbury's told Sky only "a few" remain in their stores.