Christmas Lights Running Costs in 2026: A 1,000-Bulb LED Tree Costs £1.44 a Season – the Snow Machine Is the Real Bill
A thousand-bulb LED set wrapped round a seven-foot tree costs about £1.44 to run for the whole of Christmas. That’s six hours a night for 38 nights at the current price cap, and it’s the single most useful number for anyone worried about Christmas lights running costs in 2026. The snow machine your neighbour bought last year is a different story: run it for just one hour a night and it costs more than six of those trees put together.
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Last November a quarter of British households told Uswitch they were shrinking their displays because of energy bills. I think most of them cut the wrong thing.
Christmas lights running costs at the 26.32p price cap
The Ofgem cap for October to December 2026 puts the average electricity unit rate at 26.32p per kWh on Direct Debit, according to Ofgem’s published cap rates. That’s a touch up from 26.11p over the summer. The rate also has no VAT on it, because the temporary cut on electricity runs from 1 October to 31 March, which is a small, welcome quirk of this particular winter. Your region shifts things a little – East Midlands customers pay around 25.36p, Merseyside and North Wales nearer 27.86p – but on lights the gap amounts to pennies.
Here’s what common decorations cost on that rate. I’ve used six hours a night for 38 nights, which is the average length of time decorations stay up according to Uswitch’s 2025 survey of 2,000 people. Wattages come from manufacturer specs or published test figures, and I’ve said where a number is an estimate.
| Decoration | Power draw | Cost per hour | Cost for the season |
|---|---|---|---|
| 200-bulb LED string | 4.8W | 0.13p | 29p |
| Philips Hue Festavia, 250 bulbs | 15W (Hue’s typical figure) | 0.39p | 90p |
| 1,000-bulb LED tree lights | 24W | 0.63p | £1.44 |
| Small fan-powered inflatable | 24W | 0.63p | £1.44 |
| Old 100-bulb incandescent set | about 40W | 1.05p | £2.40 |
| Illuminated outdoor sign | 100W | 2.63p | £6.00 |
| 10-12ft inflatable Santa | 150-250W (estimate, 200W used) | 5.26p | £12.00 |
| Snow machine, one hour a night only | 900W | 23.7p | £9.00 |
Look at the top four rows. Everything most people actually own lands under a pound and a half for five weeks. And then the bottom of the table jumps by a factor of ten.
Your LED string isn’t the problem
Which? tested six LED sets from UK shops and found a 200 or 400-bulb chain on for six hours cost about 0.74p a day. Across two months the 400-bulb chain came to 47p. Colour made no difference to the bill – one multicoloured set was the priciest in the test and another was among the cheapest – and the twinkling-flashing mode was the cheapest setting of the lot, around 64% less than leaving them steadily on, according to Which?’s Christmas lights testing. Those figures were worked out on a 27.35p unit rate, so they’re very slightly cheaper again this year.
To put that in perspective, Which? puts a single tumble dryer load at about 36p, more than a 200-bulb string costs for the entire season. People cutting back on fairy lights to save money are, in my view, wasting the one bit of December that reliably makes a house feel better for almost nothing – and if you’re building up a cosy front room for winter, the warm-white string on the bookshelf is doing more work than any lamp you’d buy instead (I made the case for small, low light sources in our cosy living room lighting guide).
Skip the guilt. Put the lights up.
The bulb count matters more than the brand. Longacres lists its sets at 0.024W per bulb, so a 200-bulb string is 4.8W and a 2,000-bulb cluster is 48W. EDF puts typical LEDs at between 5W and 10W per 100 bulbs, so some cheaper sets draw up to four times what the Longacres ones do. Even at the top of that range, a 1,000-bulb tree would only reach about £6 for the season. It’s still not a number worth losing sleep over.
Where the money actually goes: inflatables, signs and snow machines
Uswitch reckons around a million households now go big with snow machines, inflatables or high-wattage signs, and its survey found 600,000 homes with a snow machine. That’s the line on the bill that bites. A typical snow machine pulls about 900W while it’s running – roughly the same as a microwave – so an hour a night across the season comes to £9. Leave it chugging for three hours each evening because the children like it and you’re at £27 before you’ve plugged in anything else.
Inflatables are more complicated than people assume. The small fan-powered ones (the 4ft snowman by the front door, usually from the garden centre for twenty-odd quid) draw about 24W according to Uswitch’s 2025 Christmas display research, so they cost the same as a 1,000-bulb tree. The giant ones are a different animal. Homebuilding’s estimates put a 10 to 12ft Santa at between 150W and 250W, because it needs a much bigger fan to stay upright in a breeze, and at 200W that’s £12 for the season. It’s not ruinous, but it’s eight times the tree.
Solar outdoor lights get pushed every November as the free option, and in December they mostly aren’t worth it. The panels need daylight to charge, and in Manchester or Glasgow at this time of year you’re getting around seven or eight hours of weak, low sun, often under cloud. Expect a set that glows for a couple of hours after dusk and then gives up by the time you’re home from work. They’re fine for a garden that’s lit in summer and early autumn, which is why we liked them in our spring garden solar lights guide, but for a Christmas display a mains LED set at about 70p for the season is cheaper than the frustration.
Illuminated signs and old-style rope lights sit in between. A 100W sign costs £6 over 38 nights.
Add it up for two different houses. A normal setup – a 1,000-bulb tree, two 200-bulb strings indoors, a 500-bulb LED set over the porch and one small inflatable – comes to about £4.18 for the whole season. The all-out version, with the 12ft Santa, a lit sign and the snow machine on for an hour a night, is nearer £31. Neither is going to sink a household budget, but only one of them is worth trimming if you’re watching every pound this winter, and the sums are worth seeing next to the bigger costs like heating (our piece on what an electric heater really costs per hour puts a 2kW heater at well over 50p an hour, more than an entire season of LED tree lights).
The £149 smart lights question
Smart Christmas lights get sold partly on efficiency, and that bit of the pitch is nonsense. The Philips Hue Festavia is currently listed at £149 at AO and Boots on PriceSpy for the 250-bulb set, with a price history low of £119 – Black Friday is the likeliest point it’ll drop back there. Hue’s own typical power figure is 15W, which makes it cheaper to run than a 1,000-bulb set but slightly more than three basic 200-bulb strings.
But the Festavia also draws about 0.5W on standby. Leave it plugged in all year (which plenty of people do, because it’s on the Hue app and they stop thinking about it) and that’s around £1.15 a year in standby alone, more than the 90p it costs to actually light up for Christmas. You’d be paying more to keep it waiting than to use it.
The direct rival is Twinkly, whose 250-bulb Generation 2 set has historically sold for somewhere between about £85 and £115 in the UK. I’m guessing here on where it’ll land this Black Friday, because I haven’t seen 2026 deal pricing for it yet. Mighty Gadget’s long-running review put the Festavia about £25 dearer than the Twinkly, and the Twinkly app is a bit of a faff to set up but more flexible once it’s running; the Hue version wins if you already own a Hue bridge.
Should you buy either? If you like the idea of mapping colours to the shape of your tree and changing the effect from the sofa, yes, it’s a properly fun bit of kit. If you’re buying one to save money, no. A basic warm-white LED string for around a tenner does the same job for your bill, and the £139 difference would cover the running costs of a 1,000-bulb tree for the next 90-odd Christmases.
Those old sets in the loft
There’s one place where switching lights does make a measurable difference: the old incandescent sets that have been coming out of the same box since about 2009. A 100-bulb filament string draws roughly 40W, which is around eight times what a similar LED set uses. On its own it still only costs £2.40 for the season, so the money isn’t really the reason to bin it.
Heat is. Filament bulbs get hot, the cable insulation on a set that’s spent fifteen summers in a hot loft goes brittle, and the plugs on older sets often aren’t fused the way modern ones are. If a set has split wiring, missing bulbs or a transformer that feels warm after half an hour, it’s done. Outdoor lights need an IP44 rating or higher, and the extension lead running out of the kitchen window should be one designed for outdoor use rather than the four-way block from the study. Daisy-chaining extension leads is the classic December mistake.
Replacing two old indoor sets with LED ones will save you about £4 across the season. That doesn’t pay for the new lights on bill savings alone, so be honest with yourself about the reason you’re doing it. If you’re having a wider sort-out of the decorations box, our comparison of real vs artificial Christmas trees looks at the other big decision of the season.
The cheapest fix is a timer, not new lights
Leaving lights on all night is the habit that actually changes the numbers. A 1,000-bulb LED tree on 24 hours a day for 38 days costs about £5.76 rather than £1.44, four times as much for hours when nobody’s awake to see it. With a snow machine or a big inflatable, the multiplier hurts a lot more.
A plug-in mechanical timer costs about eight quid in most DIY shops, and the cheap smart plugs aren’t much more. Set the tree for 4pm to 10pm and forget about it. Most decent LED sets now come with a built-in six-hour timer on the controller box too, which is worth checking before you buy anything extra – it’s usually the button you’ve been pressing to cycle through the twinkle modes.
And switch to the twinkle setting while you’re at it. Which?’s 64% saving on twinkling-flashing versus steady on is the biggest single cut available, even if it’s a 64% cut of very little.
For bigger savings in the house generally, the boring stuff wins: draught excluders and a thermostat schedule do far more than any Christmas economy. Our guides to draught proofing on a budget and the energy saving gadgets that actually pay back are where the real money is this winter.
What changes in January
Ofgem is due to announce the January to March 2027 cap by 25 November, so the unit rate for the back half of most people’s Christmas display could shift. I don’t know which way it’ll go, and anyone telling you with certainty right now is guessing too. Even a 10% rise would move a 1,000-bulb LED tree from £1.44 to around £1.58 for the season, which tells you everything about how little the cap matters for LEDs and how much it matters for anything with a heating element or a big fan.
The VAT holiday on electricity lasts until 31 March 2027, which takes a little off every figure in this piece compared with last year. One of the newer sets doesn’t need any of that to be cheap. A snow machine needs all of it.
Uswitch found a third of households planned to switch their lights on in November last year, with 1 December the most popular date. If you’re one of the early ones, you’ve got roughly 50 nights ahead instead of 38 – add a third to every number above and the LED tree still costs under £2.
So which is it in your house this year: a few quid of fairy lights and a timer, or are you finally getting the 12ft Santa?
