Answer:
Step-by-step explanation:
An LED light of 3 watts gives off the same amount of light as an incandescent bulb of 45 watts. This means that the LED light uses less power than the incandescent bulb (option A).
Power is the rate at which energy is used or transferred. In this case, power is measured in watts. The fact that the LED light is only 3 watts while the incandescent bulb is 45 watts indicates that the LED light consumes less energy to produce the same amount of light.
LED lights are known for their energy efficiency compared to traditional incandescent bulbs. They produce light using a different technology that requires less energy. This is why LED lights have become increasingly popular for their lower power consumption and longer lifespan.
To further understand this, let's compare the energy usage. If you have an LED light and an incandescent bulb turned on for an hour, the LED light would consume 3 watt-hours of energy (3 watts x 1 hour = 3 watt-hours), while the incandescent bulb would consume 45 watt-hours of energy (45 watts x 1 hour = 45 watt-hours). As you can see, the LED light uses significantly less power over time.
In conclusion, the LED light uses less power than the incandescent bulb, making it more energy-efficient.
(EXTRA INFO)
Wattage equivalence: This measures how much energy a light bulb uses compared to an incandescent bulb with the same lumen output. LED and CFL bulbs have a higher wattage equivalence than incandescent bulbs, which means they use less energy to produce the same amount of light.