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19 votes
Accepted

Dynamo hub lights flickering: should I be concerned?

Shimano hubs and B&M lights should work nicely together. I've used that combination in the past. You need to ride around for a few minutes to charge up the capacitors that power the stand-lights ...
Paul H's user avatar
  • 4,152
12 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 ...
RoboKaren's user avatar
  • 29.3k
12 votes

Is there a bicycle light which is hard to steal or very portable?

I always carry lights with me when riding. If I'm parking somewhere safe, like my garage at home or our locked bike room at work, then I'll leave lights attached. If I'm at the shops then I lock the ...
Criggie's user avatar
  • 127k
11 votes
Accepted

Flashing light when pushing bike with (constant) low speed

This happens because the power from a hub dynamo (which technically is a magneto, not a true dynamo) is not clean sine-wave AC but consists of short pulses with alternating polarity. At high speeds ...
ojs's user avatar
  • 22.2k
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 ...
Benedikt Bauer's user avatar
10 votes

150 VS 300 VS 450 lumen rear light for daytime use

Which lights are you considering? Even 150 lumens seems astoundingly powerful. For comparison, the Bontrager Flare R City (which I use) is already somewhat irritating to look at after a while, and it'...
MaplePanda's user avatar
  • 15.8k
10 votes
Accepted

Advice on hub-driven rear lights

Yes, any modern LED generator rear light should be fine. Some brands to look at are Busch + Muller, Spaninga, and Hermanns. Recreating the mounting and wiring cleanly with the new light is another ...
Nathan Knutson's user avatar
9 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; ...
RoboKaren's user avatar
  • 29.3k
9 votes
Accepted

Using an LED torch as a helmet light, will I blind oncoming drivers?

I have a helmet mount very similar, and yes its totally possible to dazzle and annoy any other road user, from pedestrians to other cyclists to motorised vehicle drivers. Benefits to a helmet light ...
Criggie's user avatar
  • 127k
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 ...
bobflux's user avatar
  • 1,784
8 votes

Has anyone successfully changed the battery in a Knog Blinder Mini Dot?

I found this which suggests that you'll have to open it by force - I'd try a razor saw if there's no obvious edge to pry. You may not need to replace the battery - if there's a protection circuit ...
bertie's user avatar
  • 385
6 votes

Do hub dynamos with higher power output exist?

Actually a 3 W dynamo is mislabeled. It isn't 3 W. It is 0.5 A. A hub dynamo is mostly a constant current device. The faster it rotates, the higher is the frequency and voltage of the alternating ...
juhist's user avatar
  • 19.8k
5 votes

Stopping interference between LED lights and wireless cycling computer

I too had major interference problems between my 700lumen Smartlight (no, not the Garmin one, just a brand called Smart) and VDO M6 wireless computer with all 3 sensors (speed, cadence, HRM) stopping ...
ian's user avatar
  • 177
5 votes

Hub dynamos and standlights

Thought I should update this just in case anyone's been looking (probably not so much in summer!). I got a good deal on a B&M Cyo plus. This has a switch and standlight. The rear light connection ...
itma_its_easy's user avatar
5 votes

Lights that don’t use o-rings

To give a brand neutral answer: all the big light brands have at least some o-ring mounting styles now, but some of them still offer clip-in brackets as optional parts for the same lights. And there ...
Nathan Knutson's user avatar
5 votes

Is there a bicycle light which is hard to steal or very portable?

I think your question is two-fold, I will answer accordingly: Is there a bikelight product which is very hard to steal? As long as common fasteners (hex bolts, philips screw, etc...) are used to ...
Saaru Lindestøkke's user avatar
5 votes

Is there a bicycle light which is hard to steal or very portable?

I personally use a helmet which has lights built in, but I've recently noticed that the same manufacturer has released detachable lights: Lumos Firefly. They attach magnetically to a mounting plate. (...
Aaron F's user avatar
  • 151
4 votes

Using an LED torch as a helmet light, will I blind oncoming drivers?

Not necessarily blind, but annoy and distract. For oncoming traffic, the best lights are ones mounted below eye level and that limit the upper beam. The easiest way to check for this online is to see ...
ojs's user avatar
  • 22.2k
4 votes
Accepted

Hub dynamos and standlights

If your rear light will not come with standlight function, so (in the options I know) the front light with standlight will not "turn it on" at the rear light. Such lamp is AXA Echo 30 Auto Steady. It ...
krzyski's user avatar
  • 2,721
4 votes

How reliable is the "smart" brake detection on a $20 tail light?

The brake detection is based on an accelerometer, and is not a complicated feature. I have had a similar feature on a Chinese front light and it worked ok from what I can see. So that's probably not ...
thelawnet's user avatar
  • 4,240
4 votes

150 VS 300 VS 450 lumen rear light for daytime use

The measured brightness is less important than the beam formation, or lens configuration. Ideally for daytime usage, you want a rear light that gets driver's attention and lasts the whole ride. It ...
Criggie's user avatar
  • 127k
4 votes

Is there a bicycle light which is hard to steal or very portable?

Personally, I take lights if I'm going to ride in the evening: if I'm delayed because of a puncture or other reason, I prefer to ride safe home (I also have a light mounted on my helmet). Hard to ...
Rеnаud's user avatar
  • 21k
4 votes

Is there a bicycle light which is hard to steal or very portable?

I think it's a gross mistake that bicycle manufacturers generally fail to include lights that are powered by one of the main power sources of the bike. For non-electric bikes, this means lights ...
juhist's user avatar
  • 19.8k
3 votes

AC dyno light on battery pack?

If the AC/DC convert is a simple rectifying bridge plus filter and voltage stabilizer, it should work with a direct current source as well. The only question is how many batteries connected serially ...
Grigory Rechistov's user avatar
3 votes

Using an LED torch as a helmet light, will I blind oncoming drivers?

Have a friend wear your helmet with the light mounted on it like you planned. Then go to a small residential street at twilight and see for yourself whether it is too bright. Bring a car and try ...
SLR's user avatar
  • 383
3 votes

Installing Schwinn Vestige frame LED cable

I would start by pulling the seatpost, fork and the bottom bracket. Use a small mirror similar to a Dentists type to try to see if the wire is attached in the frame or just passes thru. You may then ...
mikes's user avatar
  • 18.7k
3 votes

My Serfas USL-5 raider usb headlight failed after rain, should I attempt user service?

Don't attempt user service. The rubber front-piece doesn't give access to the body, the case body is tightly shut, and there is no way in through the power button. All you'll do is ruin the pre-...
Samuel Russell's user avatar
3 votes

LASER bicycle lights

Here are just a few points that make lasers a less-than-ideal light source for road illumination purposes: Lasers are monochromatic. While there are some exceptions in the physical labs, all the ...
cmaster - reinstate monica's user avatar
3 votes

Is there a bicycle light which is hard to steal or very portable?

I use some very cheap lights which rarely gets stolen because they are so cheap Something like this: https://www.amazon.com/Bicycle-Light-Front-Rear-Silicone/dp/B0BL7C75MH/ref=sr_1_9?crid=...
Esben Skov Pedersen's user avatar
3 votes

Is there a bicycle light which is hard to steal or very portable?

It depends on your location and the local crime level but in general lights that require a screw driver or similar tool to remove are much much safer from being stolen than lights you can remove with ...
quarague's user avatar
  • 454

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