A user has two 40W fluorescent lamps, one 80W TV set, one 120W refrigerator and one 800W rice cooker. If the average daily consumption is less than 0.5h, the electricity consumption can be saved in one month (30d) Note: there are two 40W fluorescent lamps

30 × 0.5 × (2 × 40 + 80 + 120 + 800) / 1000 = 16.2 (degree)
Then 16.2 kwh can be saved in one month (30d)

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