Traditional incandescent bulbs only use a small proportion of the electricity they draw to generate light – the rest is wasted as heat. Energy-saving light bulbs, however, use most of the electrical energy they draw to generate light, and very little is wasted as heat.
Therefore switching to energy-saving light bulbs will save you energy and money, and reduce the amount of carbon dioxide emitted to the atmosphere. Carbon dioxide is one of the main greenhouse gases thought to be responsible for global warming, so by switching to energy-saving light bulbs you'll be helping to reduce climate change.
How do energy-saving light bulbs work?
Traditional incandescent light bulbs work by passing an electric current through a thin metal wire, which becomes hot and emits light. Unfortunately, a lot of energy is wasted as heat, while only a small proportion goes towards generating light.
Energy-saving light bulbs work in the same way as fluorescent lights. An electric current passes through gas in a tube, making the tube's coating glow brightly. Energy saving light bulbs are more efficient because most of the electrical energy is used to generate light and very little is wasted as heat.
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