Bike Lights in Berlin: The Date Your Ride Home Goes Dark

Berlin changes season in steps, and the sharpest step is the light. On 1 September the sun set here at 19:55 and there was still usable sky until 20:31. By 30 September sunset is 18:47 and the last of the twilight is gone by 19:21. That is 68 minutes of evening taken away inside one month, and almost all of it disappears while you are still at a desk.

Then on 25 October the clocks go back and remove another hour overnight. Sunset falls from 17:52 on the Saturday to 16:50 on the Sunday.

If you ride a bike in this city, those two facts decide the next six months of your commute. The evening you notice it is usually the evening you are already riding without a working rear light, somewhere on Schönhauser Allee, with a car waiting to turn across you.

The light on Tempelhofer Feld in the last minutes before the gates close. From October the Feld shuts at 19:00, which is earlier than a lot of people finish work.

The legal trigger is twilight, and it comes earlier than you think

Almost everyone I know treats bike lights as a darkness thing. You switch them on when you can no longer see the kerb.

German law asks for them earlier. StVO §17 says lighting must be used bei Dämmerung, bei Dunkelheit oder wenn die Sichtverhältnisse es sonst erfordern, so the obligation starts at twilight, and also in heavy rain or fog in the middle of the afternoon. The same paragraph says the lights must not be covered or dirty, which is why a rear light buried behind a pannier still counts as a fault.

The practical version: the moment the sun is down, you are already inside the window where lights are required, even though the sky still looks fine. In Berlin in late September that grey zone lasts about 34 minutes after sunset. By December it is roughly 42 minutes, because the sun drops at a shallower angle.

Those are the minutes when a driver's eyes are still adapted to daylight and a cyclist in dark clothing reads as part of the road surface. It is also the window most people ride through with nothing switched on.

Choriner Straße in Prenzlauer Berg. Parked cars on both sides are the normal Berlin geometry, and they are what a driver has to see past before turning into you.

What the Berlin numbers actually say

The Berlin police road safety report for 2025 counted 7,184 accidents involving cyclists, up 3.61 per cent on the year before. 4,953 cyclists were hurt, 563 of them seriously, and five were killed.

The useful part is the breakdown of causes, because it changes what a light is for.

• Errors made by cyclists: entering moving traffic 512, speed not adapted to conditions 334, ignoring a red light 172.

• Errors made against cyclists: turning error 1,463, ignoring priority signs 447, opening a door or getting in and out 417.

A driver turning across a cyclist is close to three times the cyclists' own biggest cause. That single number is the argument for good lights, and it has nothing to do with a fine. A turning driver has about a second to register that something is coming, usually while also watching for oncoming cars. Your rear light does not help there at all. Your front light is the one doing the work, because it is the only thing facing the person about to turn.

The monthly curve is worth reading honestly. In 2025 Berlin recorded 748 cyclist accidents in September, ahead of both August (617) and October (609), which makes September the fourth-busiest month of the year. I would not claim that proves darkness causes crashes, because the curve also tracks how many people are still riding. What it does show is that September combines summer traffic volume with evenings that have already gone dark, and that combination does not repeat anywhere else in the year.

There is a cleaner darkness signal in the pedestrian figures. Berlin recorded 227 pedestrian accidents in November 2024 and 236 in December 2024, against a monthly average of 185 for that year. Those are the two darkest months, and the walking population does not rise in November.

The police take it seriously enough to run about 260 visibility actions across the city every October.

Hohenzollerndamm at Bundesallee. Junctions like this one are where the 1,463 turning errors happen, and where being seen from the front matters most.

Work out the date your own ride home goes dark

General advice about autumn is easy to ignore. A date is harder.

The board below plots Berlin sunrise, sunset and civil twilight for every day from September to March, then draws your two travel times across it. Pick the time you actually leave in the morning and the time you actually ride home, and it tells you the date each one crosses into the hours when lights are required, how many of those journeys you are facing, and the day it gives the light back.

It also draws the Tempelhofer Feld gate closing times on the same axes, because for a lot of people in Neukölln and Tempelhof that shortcut is part of the route.

An 18:30 ride home is the common case, and it loses the sun on 8 October and the last of the twilight on 24 October. That is around 170 evenings before it gets its daylight back at the end of March.

What the law asks of bike lights in Berlin

This is where a lot of good equipment turns out to be illegal equipment. StVZO §67 sets the rules, and it was rewritten enough times that old advice is still circulating.

What it asks for:

• A white front headlight, dipped and aimed so it does not dazzle oncoming traffic, plus a white forward-facing reflector.

• A red rear light, plus a red non-triangular rear reflector of class Z. The light and the reflector are often one unit.

• Yellow pedal reflectors facing forward and back.

• Side visibility: either a continuous reflective strip on the tyres or rims, fully reflective spokes, or two yellow spoke reflectors set opposite each other on each wheel. Reflective stickers on the frame are not an approved substitute.

• Power from a dynamo, a battery, or a rechargeable pack. The 2017 amendment put battery and rechargeable lamps on an equal footing for every bicycle, so the old exemption that applied only to light racing bikes no longer matters.

Two details catch people out.

The first is the approval mark. A legal light carries a wavy line, the letter K, and a number issued by the Kraftfahrt-Bundesamt. Plenty of bright lights sold online have no K number at all, which means they are not approved for use here however well they work. It is a small stamp, usually on the underside of the housing, and it is worth checking before you buy.

The second is flashing. A flashing front or rear light is prohibited on the bicycle itself. The one exception is a rear light with an emergency-braking function. A blinking light clipped to your bag or your helmet is fine as an extra, but it never replaces the fixed set. Turn indicators, on the other hand, became legal for bicycles and pedelecs in June 2024, so a proper indicator unit is now allowed where a blinker is not.

A battery front light in use. The approval mark, a wavy line with a K and a number, is usually stamped on the housing near the mount.

A rear light mounted low on the seat stay. Mounted there it stays clear of a rack and a pannier, which is where most rear lights get hidden.

What a stop actually costs

The money is the least interesting part, and it is still worth knowing, because the amounts surprise people in both directions.

• 20 euros if the lighting is missing or not working during twilight, darkness or poor visibility. This also applies when the lights are fitted but switched off, dirty or covered.

• 25 euros if you endangered other traffic at the same time.

• 35 euros if it contributed to an accident or damage.

No points, no licence consequences for a normal bicycle. Twenty euros is roughly the price of the cheap rear light you did not replace in March.

The reason to fix it is the 1,463 turning errors, not the 20 euros. But if you need a deadline, October is the month the police are out with the visibility campaign, and the checks tend to happen at exactly the junctions where the accidents are: Schönhauser Allee, Warschauer Straße, Chausseestraße, Sonnenallee, Karl-Marx-Straße.

The routes that close with the light

The other thing autumn does to a Berlin commute is take away the shortcuts. Several of the best crossings in this city are park paths with no street lighting and, in some cases, gates.

Tempelhofer Feld is the clearest example. Its opening hours follow the sun and change on the first of each month:

• September: 06:00 to 21:30

• October: 07:00 to 19:00

• November: 07:00 to 18:00

• December: 07:30 to 17:00

Read those two middle lines again. On 30 September the Feld is open until 21:30. On 1 October it closes at 19:00. Two and a half hours vanish overnight, with no warning beyond a sign on the gate. You can still leave through the turnstiles at the main entrances, but you cannot get in, so a route that ran across the Feld has to go round it from the first day of October. If you use it regularly, the gates and what sits behind each one are worth knowing before you arrive at a locked one in the rain.

The unlit paths are the quieter problem. The birch alley in Treptower Park, the towpaths along the Landwehrkanal, the diagonal through Volkspark Friedrichshain: all of them are lovely in September and, every year I have ridden them, properly dark by the middle of October. A front light on a path with no lamps is not about being seen. It is about seeing the pothole.

The birch alley in Treptower Park by the Soviet memorial. Beautiful at six in the evening in September, and completely unlit at six in the evening in November.

What I actually do

I walk the centre of the city for a living, so I watch this change happen from the pavement every year. The same pattern repeats: bright evenings in the first half of September, then a fortnight where half the bikes coming down Karl-Liebknecht-Straße have nothing on the back.

My advice is to treat it as one task on one evening, in the last week of September, before it catches you.

• Turn both lights on in daylight and look at them. A rear light that has been on a bike since last winter is usually dimmer than you remember, and a dying battery fails at the moment you need it.

• Check for the K mark on both units while you are there. If a light has none, replace that one and keep the other.

• Wipe the lenses. Berlin road spray in October is the reason half of them stop being visible, and a dirty light is a fault in its own right under §17.

• Move the rear light above the rack if a pannier sits in front of it. Low on the seat stay or high on the rack, but with a clear line to the road behind.

• Add a reflective ankle band if you have one. Moving light at pedal height is what a turning driver's eye actually catches.

That is twenty minutes in a courtyard with a cloth. The alternative is finding out on Sonnenallee in November.

One more thing worth saying plainly: if your ride home is now fully dark and your route crosses two of those big junctions, the honest comparison is not only with a better light. On the worst evenings a monthly transport ticket is the move I would make, and the bike waits for a Saturday. There is no prize for riding through every single November evening, and if the bike is going to sit outside all winter it is worth reading what actually happens to bikes left locked on Berlin streets.

If you are new to riding here, or you use a rental for the occasional trip, the rules above apply the same way. A hire bike with a dead rear light is your problem once you are on it, so check it at the stand. The practical differences between the rental options in Berlin are worth a look before the winter rates change.

Image credits

Source and licence details for the 5 photographs used in this article.

Sunset over Tempelhofer Feld in Berlin: Jana Weinholtz, CC BY-SA 4.0, via Wikimedia Commons.

The Fahrradstrasse marking on Choriner Strasse in Berlin-Prenzlauer Berg: Berlinschneid, CC BY-SA 3.0, via Wikimedia Commons.

A cyclist at the junction of Hohenzollerndamm and Bundesallee in Berlin-Wilmersdorf: Dirk Ingo Franke, CC BY 3.0, via Wikimedia Commons.

A red rear light mounted on the seat stay of a bicycle: Amin, CC BY-SA 4.0, via Wikimedia Commons.

The birch alley at the Soviet memorial in Berlin Treptower Park in autumn: Virtual-Pano, CC BY-SA 3.0, via Wikimedia Commons.