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Old 09-19-06, 12:22 PM   #26
stapfam
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A red light is used to acclimatise the eyes to dark light conditions. When I was in the forces- we used to have 30 minutes in a dim red light before going out on night patrol. To actually see with a red light- Unless it is infra-red and you have the infra-red goggles is impossible. I now ride offroad and have used a variety of "Colours" of light. The best I have used so far is a Blueish lamp. But do not use it with a yellow lens on your goggles as it turns it Green which is the colour of The countryside and shadows get lost.
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Old 09-19-06, 12:41 PM   #27
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Slightly tangental to the topic: Can anyone confirm that *flashing* headlights (of any color) are illegal for cyclists?

I see tons of cyclists on the NYC streets & bike paths with a blinking white LED on the front...but someone recently told me it's against the law for headlights to flash. Something about how it doesn't register with oncoming drivers' depth perception?
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Old 09-19-06, 12:45 PM   #28
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Quote:
Originally Posted by Bob Ross
Slightly tangental to the topic: Can anyone confirm that *flashing* headlights (of any color) are illegal for cyclists?

I see tons of cyclists on the NYC streets & bike paths with a blinking white LED on the front...but someone recently told me it's against the law for headlights to flash. Something about how it doesn't register with oncoming drivers' depth perception?
Can only tell you about the UK but lights over here have to throw a light to the front and to the side. LED's used to be not legal for some reason but they now are. Most riders here use LED's on the road, but also use a smaller lamp that flashes. Providing a flashing lamp is not used as the main illumination- as a safety lamp they can be used and are more effectively seen.
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Old 09-19-06, 01:49 PM   #29
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Quote:
Originally Posted by stapfam
Can only tell you about the UK but lights over here have to throw a light to the front and to the side. LED's used to be not legal for some reason but they now are. Most riders here use LED's on the road, but also use a smaller lamp that flashes. Providing a flashing lamp is not used as the main illumination- as a safety lamp they can be used and are more effectively seen.
The flashing mode and its effect on perception is a whole different subject. I am a supporter of solid, non-flashing lights front and rear.
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Old 09-19-06, 10:44 PM   #30
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Originally Posted by fuerein
no pretty much just plus

I stand corrected.
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Old 09-20-06, 07:56 AM   #31
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Quote:
Originally Posted by Bob Ross
Slightly tangental to the topic: Can anyone confirm that *flashing* headlights (of any color) are illegal for cyclists?

I see tons of cyclists on the NYC streets & bike paths with a blinking white LED on the front...but someone recently told me it's against the law for headlights to flash. Something about how it doesn't register with oncoming drivers' depth perception?
well in fact flashing light increases an observers ability to nail down the fact an object is there,
but it does decrease the ability to estimate speed and direction, because the eyes want to track
it and they can't track between flashes. but it does announce itself better than a solid light.

a headlight should be solid and IMHO a green led blinky on the front
would be supplemental, and a good idea. the primary shouldn't flash though

motorcycles sometimes have flashing headlights on the daytime low-beam, and boy you can
see them a mile away. in daylight
a flashing front light on a bike shouldn't be an issue, but in the dark....I guess it would be not so hot.
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Old 09-20-06, 12:19 PM   #32
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Quote:
Originally Posted by stapfam
A red light is used to acclimatise the eyes to dark light conditions. When I was in the forces- we used to have 30 minutes in a dim red light before going out on night patrol. To actually see with a red light- Unless it is infra-red and you have the infra-red goggles is impossible. I now ride offroad and have used a variety of "Colours" of light. The best I have used so far is a Blueish lamp. But do not use it with a yellow lens on your goggles as it turns it Green which is the colour of The countryside and shadows get lost.
Yeah, a red light is used when you're gonna be operating in darkness with NO lighting at all. But to use it as a primary light source, it's very poor. The eye's poor sensitivity to it makes it hard to discern variations and shades of red. The low contrast won't let you see bumps & obstacles easily.

Last edited by DannoXYZ; 09-22-06 at 02:02 PM.
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Old 09-22-06, 01:58 PM   #33
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Originally Posted by geo8rge
In my search for a new flashlight I noticed that they have bright red LED flashlights. Red, it is said, does not decrease your night vision as much as white. I wonder if a red head light, or a bright red mixed with a bit of white would not be the best for seeing obstacals, both in the beam of light and outside it, at night.
You may find this interesting:

http://members.misty.com/don/lede.html
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Old 09-22-06, 05:52 PM   #34
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But, if you use a flashing red light on the front of your bike (maybe even two), you'll get cars to move over and out of your way.


(Yeah, I just had to throw that in there...sorrry).
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