Most bicycle accidents are crashs from the FRONT?
#26
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Some don't modulate? really? https://www.gadgetjq.com/headlightmodulator.htm
https://www.webbikeworld.com/Reviewed...h/visipath.htm
And here's the part: https://www.customdynamics.com/signal..._modulator.htm
https://www.webbikeworld.com/Reviewed...h/visipath.htm
And here's the part: https://www.customdynamics.com/signal..._modulator.htm
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https://ibiblio.org/rdu/DRLs/studies.htm
https://www.bmj.com/content/328/7444/857.full
edit: Every study says lights help, there are simply no studies saying how much light helps. While certainly there is probably a dropoff in effectiveness depending on how bright the light is, what is that dropoff? What amount of lumens do you need to still be effective? A blanket statement like "bike lights won't work" is not based on any science.
Last edited by chrisb71; 11-08-10 at 08:26 AM.
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That's weird, because here in Indiana I've actually seen quite a few from Harleys to crotchrockets. If you have MC I would strongly recommend you get this because it does make you notice them fast and from a distance.
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https://ibiblio.org/rdu/DRLs/studies.htm
https://www.bmj.com/content/328/7444/857.full
edit: Every study says lights help, there are simply no studies saying how much light helps. While certainly there is probably a dropoff in effectiveness depending on how bright the light is, what is that dropoff? What amount of lumens do you need to still be effective? A blanket statement like "bike lights won't work" is not based on any science.
https://www.bmj.com/content/328/7444/857.full
edit: Every study says lights help, there are simply no studies saying how much light helps. While certainly there is probably a dropoff in effectiveness depending on how bright the light is, what is that dropoff? What amount of lumens do you need to still be effective? A blanket statement like "bike lights won't work" is not based on any science.
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Some don't modulate? really? https://www.gadgetjq.com/headlightmodulator.htm
https://www.webbikeworld.com/Reviewed...h/visipath.htm
And here's the part: https://www.customdynamics.com/signal..._modulator.htm
https://www.webbikeworld.com/Reviewed...h/visipath.htm
And here's the part: https://www.customdynamics.com/signal..._modulator.htm
Personally, I always run my headlight during the day, in flash mode. I believe it helps some. If it doesn't.. well, I have rechargeable batteries so no big deal..
I don't get why you're so aggro against someone using a front light during the day... if you don't want to use one, then don't.
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One subtle attention-grabbing benefit that's been lost in the switch from HIDs to LEDs is that little spectrum shift that the HID gives over rough roads.
I definitely watch for it myself, since I associate it with high-powered cars (no other bikes around here use HIDs).
I definitely watch for it myself, since I associate it with high-powered cars (no other bikes around here use HIDs).
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One subtle attention-grabbing benefit that's been lost in the switch from HIDs to LEDs is that little spectrum shift that the HID gives over rough roads.
I definitely watch for it myself, since I associate it with high-powered cars (no other bikes around here use HIDs).
I definitely watch for it myself, since I associate it with high-powered cars (no other bikes around here use HIDs).
#34
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Just this morning I was pulling over into a left turn lane to get ready to enter an intersection and make a left hand turn. A big black SUV comes from the left on the other street, making a very wide right hand turn and went out of his lane and into mine and almost ran me over despite the fact I was in the right-hand side of the left turn lane. There are many ways an errant cager can attack a bicyclist.
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Last edited by Artkansas; 11-08-10 at 02:39 PM.
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You fail to mention that those are all aftermarket add-ons that the majority of people don't use. Most motorcycles don't have flashing headlights. I live in L.A... millions of vehicles here and I don't think i've ever seen more than a couple motorcycles with modulating headlights in the 15 years i've lived here.
Personally, I always run my headlight during the day, in flash mode. I believe it helps some. If it doesn't.. well, I have rechargeable batteries so no big deal..
I don't get why you're so aggro against someone using a front light during the day... if you don't want to use one, then don't.
Personally, I always run my headlight during the day, in flash mode. I believe it helps some. If it doesn't.. well, I have rechargeable batteries so no big deal..
I don't get why you're so aggro against someone using a front light during the day... if you don't want to use one, then don't.
I don't care if a person wants to ride a bicycle with his lights on in the daytime, but it's not doing anything for him safety wise other then making him feel like he's safer.
#38
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#39
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Many cyclists have had positive experiences with flashing headlights during the day. I've personally had several motorists stop and ask me what kind of headlight I was running, because it was so noticeable. If you really doubt the ability of a blinking headlight to alert motorist to your presence, why not give it a try? Buy a decently bright headlight with a flash mode, and ride around your city. If it doesn't work for you, then ditch it.
Where no study has been done, and no statistical evidence is available, all we have to go on is anecdotes. Anecdotal evidence seems to suggest that cyclists who run a blinking headlight notice an increase in motorist awareness of their presence. Unfortunately, anecdotal evidence can be far from true. So the best bet is to just try it for your self and see.
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GriddleCakes WE ARE NOT TALKING ABOUT MOTORCYCLES or CARS. And yes I use a blinker on the front because it does attract attention, but I don't use one during the day, because I have yet to see a blinking headlight used in the day that was bright enough to attract attention. Now maybe the few that I've seen were just weaker older versions, I don't know, I didn't pull them over and ask. But in broad daylight the size of a bicycle light at 1" in diameter will just get lost in the background. Maybe if you buy a $1,200 headlight putting out 1,400 lumens then you may be right, that might work. Because you see, to have the same intensity of a car headlight you need 1,000 lumens to be the same as an older 9006 car bulb on dim, not 700 or so; but there's still that nasty little 1" diameter lens. And a lot of newer cars are running over 3,000 lumens. And guess how many lights I've seen on the road living in a city of 300,000 people that were putting out that kind of light levels (based on just the older 9006)? ZERO. In fact my little 250 lumen light is among the brightest I've seen!! So super bright lights over 450 lumens are not the norm.
Maybe some day a 1,400+ lumen light will be cheap enough for the general population to buy one, but that's not happening anytime soon.
Maybe some day a 1,400+ lumen light will be cheap enough for the general population to buy one, but that's not happening anytime soon.
Last edited by rekmeyata; 11-09-10 at 08:06 PM.
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GriddleCakes WE ARE NOT TALKING ABOUT MOTORCYCLES or CARS. And yes I use a blinker on the front because it does attract attention, but I don't use one during the day, because I have yet to see a blinking headlight used in the day that was bright enough to attract attention. Now maybe the few that I've seen were just weaker older versions, I don't know, I didn't pull them over and ask. But in broad daylight the size of a bicycle light at 1" in diameter will just get lost in the background. Maybe if you buy a $1,200 headlight putting out 1,400 lumens then you may be right, that might work. Because you see, to have the same intensity of a car headlight you need 1,000 lumens to be the same as an older 9006 car bulb on dim, not 700 or so; but there's still that nasty little 1" diameter lens. And a lot of newer cars are running over 3,000 lumens. And guess how many lights I've seen on the road living in a city of 300,000 people that were putting out that kind of light levels (based on just the older 9006)? ZERO. In fact my little 250 lumen light is among the brightest I've seen!! So super bright lights over 450 lumens are not the norm.
Maybe some day a 1,400+ lumen light will be cheap enough for the general population to buy one, but that's not happening anytime soon.
Maybe some day a 1,400+ lumen light will be cheap enough for the general population to buy one, but that's not happening anytime soon.
#42
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You should try this light. Stands out against the background quite nicely, unless you're riding through Vegas. In which case, I doubt that there's anything you could run that'd stand out, day or night.
For what it's worth, I see numerous cyclists running flashers during the day, and they do stand out, to my eyes. Flashing lights don't get lost in the background any more than dayglo clothing does, provided it's a decent light. Most modern LED bike lights are bright enough to be seen from distances important to a cyclist, even during the day. Motorcycle headlights obviously need to be much stronger, seeing how fast they can travel. But lights that're less strong than automotive lights are still visible.
For what it's worth, I see numerous cyclists running flashers during the day, and they do stand out, to my eyes. Flashing lights don't get lost in the background any more than dayglo clothing does, provided it's a decent light. Most modern LED bike lights are bright enough to be seen from distances important to a cyclist, even during the day. Motorcycle headlights obviously need to be much stronger, seeing how fast they can travel. But lights that're less strong than automotive lights are still visible.
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Note that many states regulate the percentage modulation and it's almost never actually a flashing headlight like a bicycle, it's a few % modulation, yet plenty to increase the conspicuity of the light.
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But in broad daylight the size of a bicycle light at 1" in diameter will just get lost in the background. Maybe if you buy a $1,200 headlight putting out 1,400 lumens then you may be right, that might work. Because you see, to have the same intensity of a car headlight you need 1,000 lumens to be the same as an older 9006 car bulb on dim, not 700 or so; but there's still that nasty little 1" diameter lens
Yet people expect other drivers to notice and react to "emergency flashers" and "turn signals" that are smaller and dimmer than bicycle headlights.
Ridiculous. No wonder all daytime motorists are already dead.
Last edited by jputnam; 11-10-10 at 12:07 AM.
#45
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That's because I am weird. Now that we've got that cleared up, when the bicycle lights can reach 1400 1400 lumens and more at a price the general population can afford then you might have a valid argument for running with them on in the day time. And remember you didn't have any evidence that running a light on a bicycle saved lives either
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That's because I am weird. Now that we've got that cleared up, when the bicycle lights can reach 1400 1400 lumens and more at a price the general population can afford then you might have a valid argument for running with them on in the day time. And remember you didn't have any evidence that running a light on a bicycle saved lives either
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