LED Savings Calculator

LED bulbs use up to 90% less energy than traditional incandescent or halogen bulbs and last significantly longer — often 15,000 to 25,000 hours compared to 1,000–2,000 hours for older bulbs. This saves you money on both your electricity bill and the cost of frequently replacing bulbs. LEDs also produce less heat, making them safer and more comfortable to use.

A typical 8–10W LED bulb delivers the same brightness as a 60W incandescent or 42W halogen bulb, cutting energy use by roughly 80–90%. Over a year of average use, a single bulb switch can save several dollars in electricity — multiply that across every bulb in your home and the savings add up quickly.

The payback period is the total upfront cost of your new LED bulbs divided by the annual electricity savings they generate. For example, if you spend $50 on LED bulbs and save $100 per year in electricity, your payback period is 6 months — after which the savings are pure profit.

Energy costs vary by country and region. In the United States, the average retail electricity price is around $0.16–$0.30 per kWh. In the UK it is typically 24–30 pence per kWh. Check your most recent electricity bill to find your exact rate, as it makes a significant difference to your calculated savings.

Because LED bulbs consume far less electricity, they reduce the demand on power stations — most of which burn fossil fuels. The calculator estimates CO₂ savings using an average grid emission factor of approximately 0.233 kg CO₂ per kWh. Switching 10 bulbs can easily save over 100 kg of CO₂ per year.

Yes. A quality LED bulb typically lasts 15,000–25,000 hours, compared to around 1,000 hours for incandescent bulbs and 2,000–4,000 hours for halogens. This means you could go a decade or more without replacing an LED bulb that is used a few hours a day, saving both money and the inconvenience of frequent changes.

As a general guide: a 6–8W LED replaces a 40–60W incandescent, a 9–12W LED replaces a 75–100W incandescent, and a 4–5W LED replaces a 35–50W halogen spotlight. Look for the lumen output (brightness) rather than wattage when choosing your replacement — a 60W equivalent LED typically delivers around 800 lumens.

It depends on your energy cost and usage hours. For bulbs used many hours a day — such as kitchen or living room lights — the payback period on replacing working halogens with LEDs is often less than a year. The calculator above gives you a precise answer based on your own usage and energy tariff.