What light bulbs cost to run
An LED gives the same light as an old incandescent bulb for about a sixth of the power, so the bulb you choose matters more than how long you leave it on.
Side by side
| Appliance | Typical power | An hour | A year, typical use |
|---|---|---|---|
| LED downlight | 13 W | 0.34p | £5.00 |
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