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the reason that a 15-watt compact fluorescent light bulb can give off about the same amount...

the reason that a 15-watt compact fluorescent light bulb can give off about the same amount of light as a 60 watt incandescent light bulb is because

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This is because 15-watt compact fluorescent light bulb is more efficient in converting the electrical energy into light energy as compared to the 60 watt incandescent light bulb in which some amount of electrical energy is lost to heat. That is why 15-watt compact fluorescent light bulb can give same amount of light as by 60 watt incandescent light bulb.

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