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How much does it cost to run a set of LED Christmas lights?
A set of LED Christmas lights costs about 0.3p an hour to run.
Work out your cost
Find the wattage on the label or rating plate, usually on the back or underneath.
Low, typical and high running costs
Using 6 hours a day.
| Rating | Unit cost | Per week | Per year | |
|---|---|---|---|---|
| Low | 5W | 0.1p / hour | 6p | £2.88 |
| Typical | 10W | 0.3p / hour | 11p | £5.76 |
| High | 30W | 0.8p / hour | 33p | £17.29 |
How it compares
| Appliance | Typical use | Per day | Per month |
|---|---|---|---|
| Storage heater | 7 hours a day | £2.14 | £65.15 |
| Hot tub | switched on all day | £2.11 | £64.05 |
| Oil-filled radiator | 4 hours a day | £1.47 | £44.83 |
| Fan heater | 3 hours a day | £1.26 | £38.43 |
| Convector heater | 4 hours a day | £1.18 | £36.03 |
| Christmas lights (LED string) | 6 hours a day | 2p | 48p |
How we work it out
Cost per hour = watts ÷ 1,000 × share of time at full power × price per kWh. For a 10W christmas lights (led string) at 100%: 10 ÷ 1,000 × 1 × 26.32p = 0.3p.
The wattage on this page is our estimate from typical models on sale, as we couldn't find an independent published figure. Your own appliance may differ, so check its rating plate or energy label for the most accurate figure.
Sources
Questions
How much electricity does a set of LED Christmas lights use?
Most use between 5W and 30W. A 10W model running at full power uses 0.01 kWh an hour.
How much does a set of LED Christmas lights cost to run per day?
Used for 6 hours a day it costs about 2p, based on the Ofgem price cap rate of 26.32p per kWh.
Where does the electricity price come from?
We use the Ofgem price cap average for Great Britain, paying by Direct Debit: 26.32p per kWh for 1 Oct 2026 to 31 Dec 2026. Electricity rate includes 0% VAT, which applies from 1 October 2026 to 31 March 2027. Storage heater and EV pages use an off-peak rate instead. Your own tariff may be higher or lower, so check your bill and enter your rate in the calculator.