Paris NightTours

14 Paris Night Facts That Will Surprise You

Short answer. The Eiffel Tower's sparkle is 20,000 bulbs and lasts exactly five minutes. Its beacon reaches 80 kilometres. The last sparkle of the night is the only one where the tower goes dark first. And the stretch of river every Paris cruise sails has been a UNESCO World Heritage Site since 1991.

1. The sparkle is 20,000 bulbs, and it lasts exactly five minutes

Not approximately five. The lights fire in short random bursts at the beginning of every hour and stop after five minutes, on a timer. The effect was designed to look like camera flashes going off across the whole structure.

2. It was originally ten minutes

The sparkle was switched on for the first time on 31 December 1999, to welcome the year 2000. In 2008 the duration was halved to five minutes, to cut energy use and extend the life of the installation.

3. Installing it took 25 steeplejacks five months

It also took 40 kilometres of string lights and power cables, 40,000 clamps, 80,000 miscellaneous metal parts weighing 60 tonnes in total, and 230 electrical cabinets. All of it was fitted to a structure that was already 110 years old.

4. The last sparkle of the night is different from all the others

At the 1am sparkle the golden floodlighting and the beacons are switched off first. For those five minutes the tower is nothing but the flashing against a black sky, which is a completely different photograph from the one everybody else takes at 9pm.

5. The beacon reaches 80 kilometres

Four marine-type projectors, one on each side of the summit, come on at dusk. On a clear evening the rays carry up to 80 km — further than the distance from Paris to Reims.

6. Nothing switches the lighting on by hand

The golden lighting is triggered by twilight sensors and comes on within ten minutes of it getting dark, whatever the date. That is why the tower is lit at 17:10 in December and at 21:55 in June without anybody adjusting a timetable.

💡 Did You Know? Because the lighting follows the sensors rather than the clock, the Eiffel Tower is lit for about four hours on a June evening and about eight on a December one. December is the better value, and almost nobody books it.

7. Sunset in Paris moves more than five hours across the year

From about 16:55 around the winter solstice to about 21:55 around the summer one. Paris is at 48.9°N, further north than Montreal, Vancouver or every city in the continental United States.

8. The river every cruise sails is a World Heritage Site

"Paris, Banks of the Seine" was inscribed on the UNESCO World Heritage List in December 1991. The property runs from the Pont de Sully to the Pont d'Iéna and takes in the Île de la Cité, the Île Saint-Louis, the quays and the bridges — which is the exact stretch a night cruise covers.

9. Sacré-Cœur is open until 22:30, free, every day of the year

Every day, without exception, including Christmas Day. It is on the highest natural point in the city and it costs nothing, which makes it the single best-value thing to do in Paris after dark.

10. Notre-Dame stays open until 22:00, but only on Thursdays

The cathedral reopened in December 2024. Entry is free every day, and Thursday is the one evening of the week you can be inside it after dark, with last entry at 21:30.

11. The Louvre's late nights are Wednesday and Friday, not the weekend

The Louvre runs to 21:00 on those two evenings and closes entirely on Tuesdays. Last admission is an hour before closing, so the real cut-off is 20:00 — and the late slots are noticeably quieter than any daytime hour.

12. The Musée d'Orsay charges less after six on a Thursday

Its only late night runs to 21:45, and the evening ticket from 18:00 costs €12 against €16 online during the day. Last admission is 21:00.

✅ Useful Tip Two of the twelve facts above are free evenings in themselves. Sacré-Cœur until 22:30 and Notre-Dame until 22:00 on a Thursday cost nothing but the métro fare, and both are more impressive from the inside than most paid attractions.

13. The Moulin Rouge windmill has been turning since 1889

The Moulin Rouge opened in the same year as the Eiffel Tower. Its current revue is called Féerie and runs twice a night, at 21:00 and 23:00, with dinner served from 19:00. Smart dress is required and the minimum age is six.

14. The night bus changes its departure time twice a year

The open-top night tour leaves at 21:30 from 30 March to 27 September and at 20:30 from 28 September onwards. It is the only tour in the list that publicly moves its clock to follow the sunset, and it is a good sign about the operator that it does.

FactThe figureWhere it comes from
Sparkle duration5 minutes, on the hourOfficial Eiffel Tower site
Sparkle bulbs20,000 at 6 wattsOfficial Eiffel Tower site
Beacon rangeUp to 80 kmOfficial Eiffel Tower site
UNESCO inscriptionDecember 1991UNESCO World Heritage List, no. 600
Sacré-Cœur hours06:30 – 22:30, freeThe basilica's own site
Sunset range16:55 – 21:55Computed for central Paris

Why December is the fact nobody uses

Put two of the figures above together and a booking strategy falls out of them. The lighting follows the sensors rather than the clock, and the sun sets at 16:55 around the winter solstice. That means a December evening carries roughly eight hours of illuminated city, against about four in June.

December is also when the Champs-Élysées and Place Vendôme are strung with Christmas lights, when the monuments are at their emptiest, and when a seventy-minute cruise leaving at 18:00 is already sailing in the dark. The cost is the cold, which a coat solves. Almost nobody books it, and that is the arbitrage.

The one that catches people out

The Catacombs close in the evening. There is no catacombs night tour to book, whatever a search result suggests, and the same is true of a night helicopter flight over the centre — sightseeing flights do not run over Paris after dark. Both queries have volume and neither has a product behind it.

What does exist, and what people are usually reaching for when they search either phrase, is the lit exterior circuit: the bridges, the floodlit facades and the sparkle on the hour. That is what every departure here actually sells.

What to do with all this

Two of these facts change how you should book. The sunset range decides your departure time, and the sparkle schedule decides where you want to be on the hour. Our sunset times page handles the first and our what to see page handles the second.

The rest are simply worth knowing while you are standing there. If you would rather somebody told you them on the night, most of the guided departures on Paris Night Tours include a live guide rather than a recording, and the options page says which.

Tours with a live guide rather than a recording