Compact fluorescent lamps (CFLs) are significantly more energy-saving than traditional incandescent bulbs. They use about 75% less energy and can last up to 10 times longer than incandescent bulbs, making them a cost-effective option in the long run. CFLs achieve this efficiency by using a gas that produces ultraviolet light, which is then converted into visible light, rather than heating a filament like incandescent bulbs. This not only reduces electricity consumption but also generates less heat, which can lower cooling costs in buildings. However, CFLs contain a small amount of mercury, requiring special disposal methods
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