yCalculator

LED Lighting Savings Calculator

Last updated: April 2026

Bulbs to replace

Costs

Savings headline

Annual saving

£172/year

Payback

2.2 months

25-year saving

£4,260

Breakdown table

Bulb typeQtyCurrent kWhLED kWhSaving/yr
Halogen 50W8730kWh73kWh£171.67
TOTAL8--£172

LED investment

LED bulbs8 x £4.00
Total LED cost£32
Payback2.2 months

Environment

153 kg CO2/year

Equivalent to 7 trees planted per year.

How much do LED bulbs save?

Replacing a 50W halogen bulb with a 5W LED equivalent used for 5 hours per day saves approximately 82kWh of electricity per year, around GBP20 per bulb at current rates. A typical home replacing 10 halogen bulbs with LEDs saves GBP150-GBP200 per year, with the LEDs paying back in a few months.

Are LED bulbs really worth it?

Yes. LED bulbs are one of the most cost-effective home improvements available. They use 80-90% less energy than incandescent bulbs and 60-70% less than halogens. They also last 10-20 times longer, reducing replacement costs. The payback period is typically 2-6 months.

What does this mean?

This calculator is designed to help you understand the likely number before you make a decision or start an application.

Your result should be checked against official UK guidance, especially if your circumstances include dependants, exemptions, prior leave, or a complex immigration history.

Treat the figure as a planning tool rather than legal advice. Where the answer affects an application deadline or major payment, speak to an authorised adviser.

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