LED Savings Calculator
See how much you save each year by replacing an old bulb with an LED, based on your usage and electricity rate.
Do LED bulbs really save money?
Yes. An LED uses about a sixth of the electricity of an incandescent bulb for the same light. Across a whole home used several hours a day, the yearly saving runs into thousands of rupees.
How this works
Savings = (old watts − LED watts) × bulbs × hours × 365 ÷ 1000, times your per-unit tariff. LEDs use roughly 85% less power than incandescent bulbs, so a whole-home switch usually pays for itself within a year.
The savings formula
The yearly saving is simply (old watts − LED watts) × number of bulbs × hours per day × 365 ÷ 1000, multiplied by your per-unit tariff. LEDs use roughly 85% less power than incandescent bulbs for the same light, so the numbers add up fast across a whole home.
Payback is quick
An LED costs more upfront but lasts far longer and sips power, so a whole-home switch usually pays for itself within a year. LEDs also run cool and survive Tricity voltage swings better than filament bulbs — look for models with surge protection up to 4 kV.
| Old bulb | LED replacement | Power saved |
|---|---|---|
| 40 W incandescent | 5 W | 35 W |
| 60 W incandescent | 9 W | 51 W |
| 100 W incandescent | 15 W | 85 W |
| 20 W CFL | 9 W | 11 W |
Frequently asked questions
Do LED bulbs really save money?
Yes. An LED uses about a sixth of the electricity of an incandescent bulb for the same light. Across a whole home used several hours a day, the yearly saving runs into thousands of rupees.
How long do LEDs last?
Quality LED bulbs last around 25,000 hours — many years of normal use — versus about 1,000 hours for an incandescent bulb.
Is it worth replacing CFLs with LEDs?
The saving is smaller than replacing incandescents, but LEDs still use less power, last longer and switch on instantly, so it is worthwhile as CFLs fail.
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Once you know the size you need, order online for Tricity-wide delivery.
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