54 votes

Should unconventional colors be avoided for lighting?

A quick search, however, shows other colors available to purchase. Concerning "to be seen" bicycle lights, should they be avoided? Yes, they should be avoided. First, off-colors might not be legal ...
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  • 8,988
54 votes

Legality and morality around wearing a red / blue flashing light on a bicycle in the UK?

Don't show a red light of any kind on the front unless you want a head-on crash. Red is for the back only, steady or flashing. In the shadows it will look like you're riding the wrong way down the ...
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  • 47.2k
43 votes

Polite way to ride in the dark

There are now many bike lights on the market which have a shaped beam with a "horizontal cutoff" giving strong light onto the road or path, but much less above the horizon. When adjusted ...
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42 votes

Legality and morality around wearing a red / blue flashing light on a bicycle in the UK?

Legality aside, this is a bad idea. The entire point of putting distinctly colored lights on emergency vehicles is to make them instantly recognizable as such, letting people know that they need to ...
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  • 11k
41 votes
Accepted

Should unconventional colors be avoided for lighting?

Most places will legally require you to run with white lights on the front and red lights behind. This is crucially important because it immediately tells everybody else on the road whether you're ...
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40 votes
Accepted

Polite way to ride in the dark

Consider how you feel when a fellow cyclist approaches you will full beam straight ahead. It's pretty blinding, even for a moment, and especially off-road when your eyes aren't used to it. So in a ...
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  • 524
39 votes
Accepted

How to give away lights to cyclists without lights?

We have had much more success advertising it and doing it through a local bike shop or bike group. Once each, so far, that I've done. I think the psychology behind refusing a gift from a stranger is ...
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  • 23k
33 votes
Accepted

Can I legally use front facing blue light in the UK?

Regulation 16 of the Road Vehicles Lighting Regulations (1989) states: Restrictions on fitting blue warning beacons, special warning lamps and similar devices No vehicle, other than an ...
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33 votes
Accepted

Are Penny-Farthings Legal to Ride on Public Roads (UK)

UNITED KINGDOM Intro I ride a 50" Penny-Farthing almost daily on the UK's public roads, both individually and as part of groups in daylight and evening conditions. Before venturing out onto the ...
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  • 2,093
29 votes
Accepted

Does it make you safer to use lights during the day?

According to Safety effects of permanent running lights for bicycles: A controlled experiment. (Madsen JC1, Andersen T, Lahrmann HS.) they give about a 19% reduction in crash rates. There's a copy of ...
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  • 23k
23 votes

Should unconventional colors be avoided for lighting?

The topic has been discussed here in the Netherlands, and found an answer summarized in the below chart (text translated into English from the original): Wrapping up: lights should be fitting the ...
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  • 6,569
19 votes
Accepted

Turn signal lights for bikes

I'd recommend learning to do arm signals. Arm signals don't run out of batteries, and are plenty visible in most cases. They're certainly bigger than the turn signal lights you could put on a ...
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  • 45.6k
19 votes

How to give away lights to cyclists without lights?

I am from the Bike Lobby in Austria, and we are doing security checks together with the police. We make a checkpoint, the police stops all cyclists and checks their equipment. If everything is O.K. ...
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  • 1,209
18 votes

Where can I put my rear light that is designed for the seatpost if the saddle bag is in the way?

You could attach the light to something else, like another part of the frame, or a tab on the saddle bag, or your backpack. You could remove the saddle bag, attaching onto e.g. the handlebars or ...
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  • 12.1k
15 votes
Accepted

Mounting light on handlebar with bag installed

As Chris H notes, the clerk was wrong. And he suggests a good suggestion to raise the light above the bag. However, you can also mount the light below the bag as well. Operating on the same principle ...
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  • 28.6k
13 votes
Accepted

Is this a good bike light? And should I give these people my money?

OK so I do a lot of bike light reviews. I originally started writing them for this very site's community blog, and now I run a separate website called The Bike Light Database. Has anyone used one? ...
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  • 3,783
13 votes

How to give away lights to cyclists without lights?

Yeah I've thought of doing this too. However people generally don't accept spontaneous gifts because it creates a sense of obligation and humans avoid that. The other viewpoint is they are adults ...
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  • 101k
13 votes

Is my helmet/camera/light setup dangerous?

If we check the helmet's documentation, there's guaranteed to be some legalese text in there similar to: modifications to the helmet will void warranty, and may decrease the effectiveness of the ...
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  • 101k
13 votes

Legality and morality around wearing a red / blue flashing light on a bicycle in the UK?

Restrictions on fitting blue warning beacons, special warning lamps and similar devices 16. No vehicle, other than an emergency vehicle, shall be fitted with (a) a blue warning beacon or special ...
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  • 10.4k
11 votes

Does anyone make a dynamo light buffer battery that will keep it going at full power?

There are standlights, which are essentially supercapacitors combined with LED headlights. They're designed to be charged from the dynamo while riding and give you a few minutes of extra lighting when ...
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  • 28.6k
11 votes

Why doesn't my (battery-powered) light work in the cold?

Batteries, especially most types of rechargeables don't work well in cold conditions. The chemical reaction that powers the electric voltage does needs some temperature to perform as intended. If you ...
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11 votes
Accepted

Why doesn't my (battery-powered) light work in the cold?

There are two reasons why it might not work: The batteries don't like the cold. Many battery chemistries don't like the cold -- notably alkaline, manganese (heavy-duty), and NiMH/NiCad batteries. To ...
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  • 28.6k
11 votes

Mounting the front light on the frame instead of the fork or the handlebar?

The light is better on your handlebars or fork than on your frame - the frame lags and always points at some tangent to where you're going while turning, so either you need a really wide beam, or you ...
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  • 101k
11 votes

Where can I put my rear light that is designed for the seatpost if the saddle bag is in the way?

You obviously have very little seatpost exposed. Most cyclists on compact (i.e. sloping top tube) bikes should not be in this situation, but some of us are on level top tube bikes and some of us have ...
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  • 20.4k
10 votes

How to give away lights to cyclists without lights?

Consider offering to lend your spare set instead, and give an address where they can be returned. It doesn't have to be your own address; you could specify a local bike shop, for example. This ...
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10 votes
Accepted

Which front and rear lights can run while charging?

USB rechargeable lights are not typically designed to be run off of USB power continuously, they're only designed to be charged over USB. I run The Bike Light Database, and have tested dozens of ...
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  • 3,783
10 votes

Rear light with failure warning

The problem is that you have to start considering the failure modes of the failure detection system. You're quite likely to end up with a less robust system or a lot of false alarms if you have a ...
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  • 47.2k
10 votes

Polite way to ride in the dark

I had to face exactly this on an old commute. Dipping the front light was absolutely necessary in a park and another stretch of unlit bike path. It was a bright enough light to illuminate the road, ...
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  • 47.2k
10 votes

Should unconventional colors be avoided for lighting?

Depending on where you are in the world, there may be legal requirements. For example here in New Zealand at night time you MUST have White light on the front, no more than two, only one may flash, ...
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  • 101k
9 votes

Why are brake lights not common?

Summary: it's hard to make a light that reliably turns on only when the brakes are used. Most cyclists who want brake lights buy rear flashing lights because they're cheap and ubiquitous. Ignoring ...
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  • 23k

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