Are LED bulbs cheaper on electricity?
Jul 10,2024
Yes, LED bulbs are generally cheaper on electricity compared to traditional incandescent and fluorescent bulbs. Here are some reasons why:
Let's compare the cost of using a 10-watt LED bulb versus a 60-watt incandescent bulb over a year.
Electricity cost is $0.12 per kWh.
Annual energy consumption: 0.05 kWh × 365 days = 18.25 kWh
Annual cost: 18.25 kWh × $0.12 = $2.19
Annual energy consumption: 0.3 kWh × 365 days = 109.5 kWh
Annual cost: 109.5 kWh × $0.12 = $13.14
Annual Savings with LED: $13.14 (incandescent) - $2.19 (LED) = $10.95 per bulb
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1. Energy Efficiency:
LED bulbs use up to 80% less energy than incandescent bulbs and about 40% less than fluorescent bulbs. This is because LEDs convert more energy into light and less into heat.2. Long Lifespan:
LED bulbs last much longer than traditional bulbs, which means you won't have to replace them as often. This reduces both replacement costs and waste.3. Lower Power Consumption:
LED bulbs consume less power for the same amount of light output. For example, a 10-watt LED bulb can produce the same amount of light as a 60-watt incandescent bulb.4. Reduced Heat Emission:
Since LEDs emit very little heat, they can contribute to lower cooling costs in homes and buildings, especially in warmer climates.
Cost Comparison Example
Let's compare the cost of using a 10-watt LED bulb versus a 60-watt incandescent bulb over a year.
Assumptions:
Both bulbs are used for 5 hours per day.Electricity cost is $0.12 per kWh.
LED Bulb
Daily energy consumption: 10 watts × 5 hours = 50 watt-hours (0.05 kWh)Annual energy consumption: 0.05 kWh × 365 days = 18.25 kWh
Annual cost: 18.25 kWh × $0.12 = $2.19
Incandescent Bulb
Daily energy consumption: 60 watts × 5 hours = 300 watt-hours (0.3 kWh)Annual energy consumption: 0.3 kWh × 365 days = 109.5 kWh
Annual cost: 109.5 kWh × $0.12 = $13.14
Annual Savings with LED: $13.14 (incandescent) - $2.19 (LED) = $10.95 per bulb
Over time, these savings add up, making LED bulbs a cost-effective choice for electricity consumption.
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