When comparing to fluorescent light bulbs, how much energy does an incandescent light bulb consume and how much CO2 is emitted in the course of producing the electricity?
Incandescent light bulbs are extremely energy inefficient that approximately 95% of the energy each bulb uses is wasted to heat up, while only 5% generates visible light. Moreover, the power consumed by an incandescent light bulb and its CO2 emissions is 5 times more than the fluorescent one. For example, the light generated by a 20-watt fluorescent light bulb is the same as a 100-watt incandescent light bulb. If the light is turned on for 1000 hours, a 100-watt light bulb shall emit 80 kilograms of CO2, while the 20-watt fluorescent light bulb only generates 16 kilograms.
