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Most incandescent bulbs are less energy-efficient than LEDs Shutterstock/marina_shikhantsova An incandescent lighting device that reuses some of the infrared light it emits could be as efficient as an LED light but contribute less to carbon emissions. Lighting accounts for about 20 per cent of the world’s electric use and more than 10 per cent of its carbon emissions. LEDs contribute less to this, as they tend to be more energy-efficient than incandescent bulbs, but they don’t always reveal objects’ true colours. Kehang Cui at Shanghai Jiao Tong University in China and his colleagues set out to build an incandescent lighting...
