Light Bulb Savings Calculator
Compare energy costs between incandescent and LED light bulbs over their lifetime.
वार्षिक बचत
$121.00
Annual Savings vs Electricity Rate
सूत्र
## LED vs Incandescent Energy Savings LED bulbs use 75-85% less energy than incandescent bulbs while producing the same light output. ### Formula **Annual kWh = Wattage x Hours/Day x 365 / 1000 x Number of Bulbs** **Annual Savings = (Old kWh - New kWh) x Electricity Rate** A 9W LED replaces a 60W incandescent with equivalent brightness (800 lumens). Over 10 bulbs used 5 hours daily, the savings add up quickly.
हल किया गया उदाहरण
Replacing 10 incandescent 60W bulbs with 9W LEDs, used 5 hours/day at $0.13/kWh.
- 01Old annual kWh = 60 x 5 x 365 / 1000 x 10 = 1,095 kWh
- 02New annual kWh = 9 x 5 x 365 / 1000 x 10 = 164.25 kWh
- 03Annual savings = (1,095 - 164.25) x $0.13 = $121.10
अक्सर पूछे जाने वाले प्रश्न
How long do LED bulbs last?
Quality LEDs last 15,000-25,000 hours (15-25 years at 3 hrs/day). Incandescent bulbs last only 1,000-2,000 hours. This further increases LED savings.
Are LEDs really as bright?
Yes. Compare lumens, not watts. A 9W LED produces about 800 lumens, equivalent to a 60W incandescent. LED color temperature (warm vs cool) is a separate choice.
What about CFL bulbs?
CFLs use about 75% less energy than incandescent (similar to LEDs) but contain mercury, have shorter lifespans, and take time to reach full brightness. LEDs are now the clear best choice.
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