Why 50 street _ a month used 1500 degrees of electricity

1. First, calculate the hourly power consumption of a street light. The power of the city's street lights is generally between 150W-400W. Roads are different, with different wattage of street lamps, such as a main road with 400W high-pressure sodium lamps, auxiliary roads or some of the main road with 250W sodium lamps. According to the use of 250W street lamp calculation. Then the street lamp illuminated per hour of power consumption is 0.25 degrees.

Daily street light illumination time. Winter: turn on time is about 18:10 in the evening, turn off time is about 6:50 in the morning, light time is 12 hours and 40 minutes. Summer: lights on at about 18:45 in the evening, lights off at about 6:10 a.m., lights on for 11 hours and 25 minutes. So, over the course of a year, the average daily streetlight turn-on time is about 12 hours.

One night of power consumption is 0.25 * 50 * 12 = 150 degrees, according to the electricity cost of 0.56 yuan per degree, then 50 street lamps, a night spent on electricity is 150 * 0.56 = 84 yuan, a month according to the calculation of 30 days is 2520 yuan.