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Question:

Every home needs lighting bulbs, which are popular on the market now

Every home needs lighting bulbs, which are popular on the market now

Answer:

by calculation, we should choose energy-saving lamps to reduce the cost of household lighting
two kinds of lamps all work normally, 5000h, the incandescent lamp needs to pay 180 yuan electricity charge, the electronic energy conservation lamp needs to pay 33 yuan electricity charge;
when the electronic energy-saving lamp works normally, the current is 0.05A;

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