Given that the cfl bulb is rated at 10% efficiency, if the led bulb consumes half the amount of electrical power, for the same amount of usable light power output, what is the efficiency of the led bulb? similarly, if the inc bulb consumes 10x the amount of electrical power as the cfl bulb, for the same amount of usable light power output, what is the efficiency of the inc bulb?

Answer and explanation:

The efficiency of the LED bulb is 20% while The efficiency of the Inc bulb is 1%.

The lightbulb efficiency can be defined as the quotient between the amount of usable light and the amount of electrical power output. For the efficiency of the CFL Bulb:

Therefore:

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