What is Power
Power is the amount of electrical energy consumed by a lighting device or system. It is a measure of the rate at which energy is used and is typically expressed in watts (W). Power consumption is an important factor in determining the energy usage of a lighting setup.
To calculate the power consumption of a lighting system, the wattage of each individual light bulb is multiplied by the number of bulbs in the system. For example, if ten light bulbs with a wattage of 100W each are turned on, the total power consumption would be 1,000W.
In addition to watts, power can also be expressed in kilowatts (kW), where 1 kilowatt is equal to 1,000 watts. This unit is often used when communicating with utility companies and can be synonymous with “demand”. Utility companies need to ensure they can supply enough electricity to meet the power demand of various appliances and lighting systems.
Power consumption alone does not determine energy usage. The duration for which the lighting devices or systems are kept on also important. Therefore, the total energy usage of a lighting setup depends on both the power consumption and the duration of operation.