An Energy Efficient Light Bulb Uses 15 W of Power

question 36

Multiple Choice

An energy efficient light bulb uses 15 W of power for an equivalent light output of a 60 W incandescent light bulb.How much energy is saved each month by using the energy efficient light bulb instead of the incandescent light bulb for 4 hours a day? Assume that there are 30 days in one month.

• A)5.4 kW.hr
• B)1.35 kW.hr
• C)21.6 kW.hr
• D)1.8 kW.hr
• E)7.2 kW.hr

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