(This includes the illumination in elevator cabs.) To manage the traffic in the six-story structure, just one extra elevator is required, but three more pairs of escalators are required so that people may access and depart each floor. In this instance, the elevator bank might consume 130,000 kWh per year, while the escalators consume 187,000 kWh. This means that the total electricity usage of these two elements comes to up to 217,000 kWh per year. An average-sized elevator uses about 17 kilowatts (kW) of power, while a large one uses about 40 kW. So, the small elevator would use about 170 watts, while the large one would use about 340 watts. An escalator uses around 1 kW of power on average. So, the three large ones would use 3 kW each, while the single small one would use 5 kW. Thus, the annual electricity consumption of the elevator bank is about 218,000 kWh, while that of the escalators is about 374,000 kWh. The difference is 166,000 kWh or 67% of the elevator's energy consumption is used for moving people upstairs/downstairs. The remaining 33% is used for lifting people upwards/dropping them downwards. The escalator consumes more energy than the elevator because it works all the time, while the elevator needs to work only when passengers want to go from one level to another. Escalators are also heavier than elevators; thus, they need more power to move them across floors.