64 votes

Red light facing forwards?

No. You should always ride with a white light facing forward and a red light facing backwards. If you want additional illumination, you can add multiple white/red lights in the appropriate direction. ...
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  • 3,763
28 votes
Accepted

Protecting bike attachments such as lights against theft

Take the lights and anything else thats likely to be stolen off your bike. For things that can't be removed easily, you may want to use something like Pitlock security skewers (or security bolts) or ...
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  • 45.4k
21 votes

Fortified Bicycle appears to gone out of business -- where to get one of their replacement bike light batteries?

If your light is not sealed, and you can see a battery that looks like this (the colour/color does not matter) then you can pop out all the old batteries and fit new ones. Replace all the batteries ...
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  • 96k
17 votes

Protecting bike attachments such as lights against theft

In terms of accessories like lights, GPS, etc. the only way to be safe is to remove them entirely. Remember that if something is quick-releasable for you, it's also quick-releasable for thieves. Bike ...
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  • 3,763
16 votes

Fortified Bicycle appears to gone out of business -- where to get one of their replacement bike light batteries?

First, hello, and welcome to Bicycles SE. Sorry to hear about your manufacturer collapsing... that's really unfortunate, particularly for a higher-cost item like an e-bike. My guess is that 18350950 ...
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  • 796
16 votes

Do rotational-symmetric-looking front lights usually throw half their light into oncoming traffic? How To dinstiguish?

Unfortunately, there are a lot of head lights for bikes out there which do not have a sharp cutoff at the top of the light cone to avoid blinding oncoming traffic. You have to check each individual ...
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15 votes
Accepted

Cheap import lights VS branded lights

I run a bike light testing and review site called The Bike Light Database which started as a series of blog posts for the Bicycles Stack Exchange community blog. I've personally tested dozens of ...
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  • 3,763
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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  • 3,763
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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  • 96k
12 votes
Accepted

Bike lights with beam cut-off to avoid dazzling drivers?

I have actually dramatically improved the cutoff on my 1200 lumen dual LED (just for reference) with a sort of brim made out of aluminium plate. On road I run it on minimum brightness (guessing about ...
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  • 44.9k
11 votes

Where to mount a headlight if the handlebar is obscured by a basket

Something like this accessory is what you need: Can be fitted onto wired or meshed bicycle baskets. This specific model is made by the "Rixen & Kaul" and can be found in many online shops. E.g. ...
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11 votes
Accepted

Is it possible to get a light that is too bright?

Blinding road users will be the result of the following factors: Total light output Mirror design (how is the light shaped) How you aimed your light Most trail lights (and high output battery ...
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  • 29.8k
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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  • 96k
10 votes
Accepted

What is the process of adding a light to a Yamaha PW equipped ebike?

Okay, so I did some research into this and here's what I found: The Yamaha drive offers enough power for many, but not all, ebike lights to be connected. For example, Supernova M99 Pro won't work -- ...
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9 votes

Bike lights with beam cut-off to avoid dazzling drivers?

In Germany, all bicycle lights above a certain lumen value have to have a low beam feature, so it's pretty standard here. So, if you do not want to kludge your existing headlight get a german one, e....
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  • 1,199
9 votes

What to look for in a (Cheap) MTB headlight for night trail riding

As already suggested by @Batman, have a look at this Bike Light Database write up. What to look for ... LED - with cheap lights don't believe the claimed Lumen, Look at the LED specification - a ...
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  • 39.3k
9 votes

Protecting bike attachments such as lights against theft

Fortified Bike sells bike lights that are designed to be theft resistant. They're made of heavy aluminum and use security screws so most thieves won't have the proper tool to unscrew it. The also ...
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  • 1,779
9 votes

Is my helmet/camera/light setup dangerous?

Safety is not an absolute. The transition from Safe to Unsafe does not happen immediately. The state of the helmet is probably considered not safe, compromised, but not unsafe. Much will depend on ...
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  • 39.3k
8 votes

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

Sellers on Amazon.com have a lot of leeway in the naming of their products and advertising script they use. In that sense, Amazon is becoming more and more like ebay. Rather than the feedback (or ...
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  • 28.4k
8 votes

Pedal-powered head/tail lights

You can get lights that are powered by a dynamo (generator) in the front hub. Combined with bright LED front and rear lights you get excellent visibility (both seeing and being seen) and very little ...
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  • 6,876
8 votes
Accepted

What is the difference between Light and Motion's Urban 800 Chainbreaker and Urban 800 Anchor Steam bike lights?

Just the color. The products are identical. Light & Motion lists their different color variations as separate "products", probably due to some limitation of their store site engine. Note that ...
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  • 3,763
8 votes

Conceptual: Bike Lights built into Grips

You would be entering in a very busy market with no obvious advantages. Let's look at the two types of LEDs that you might use: If you're using inexpensive and low-power 5050 LEDs (15 lumens@350mW; ...
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  • 28.4k
8 votes

LASER bicycle lights

The most important part of a vehicle light is the optics because you want a beam with a precise shape and distribution in order to illuminate the road evenly, without wasting light into the sky or ...
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  • 1,249
7 votes
Accepted

Light brightness indication

You can't directly convert because you need the distance and beam angle. Lumen is a measure of output while lux is how much light is falling on an object. 5 lux is very dim indeed, less than a sliver ...
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  • 28.4k
7 votes

Is this a bike light and how do I turn it on? (I know it sounds stupid)

This is a halogen light. Such lights are usually powered by a bottle dynamo. That is a small electric generator that is driven by the front or the rear wheel. There is usually no switch. One simply ...
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  • 8,657
7 votes

Can I get a bright rear light using AA batteries, or is there a compelling reason why nonreplaceable batteries are so widespread?

Most modern lights use rechargeable lithium ion batteries. Those come in three form factors: Pouch cells, cylindrical cells and coin cells. Pouch cells come in a lot of different dimensions which ...
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  • 19.1k
7 votes

Is my helmet/camera/light setup dangerous?

No, this is not safe. The light very likely will blind/dazzle or at least annoy oncoming traffic or pedestrians. I do not know how strong yours is, but if I shine mine directly into the face of an ...
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  • 686
6 votes

Does a helmet-mounted light affect the safe functionality of the helmet?

Answer: Yes - anything on your helmet may affect its ability to function. Remember the skiing accident that gave Michael Schumacher brain damage? http://www.telegraph.co.uk/sport/motorsport/...
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  • 96k
6 votes

Bike lights with beam cut-off to avoid dazzling drivers?

Lights that are road-legal in Germany have this cut off. The Trelock LS 950 is a good example.
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  • 522
6 votes

Cheap import lights VS branded lights

From my experience the cheap Chinese lights are hit or miss. I have not tried the solarstorm but i do own one of the "BrightEyes" "brand" and was pleasantly surprised. The main thing is there is no ...
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  • 9,041

Only top scored, non community-wiki answers of a minimum length are eligible