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HLS wrote:
> "Daniel J. Stern" > wrote in message > .umich.edu... > >>On Thu, 10 Mar 2005, Backbone wrote: >> >> >>>>A couple of weeks ago my low beams would not work. The DRL and high >>> >>>Question. what is a DRL? >> >>Daytime Running Lights. > > > You and I ran afoul of each other on a previous post regarding DRL's, and I > suspect that the semantics may have been part of the issue. > > The automatic lighting systems I am used to activate low beam headlights, > sidelights, and tail lights, day or night. I refer to these as DRL's. > > Does DRL mean something different to you, Daniel? DRL has a completely different and standardized definition. It refers to white lights, mounted on the front of the car, that operate whenever the headlights and other lights are OFF. When the headlights and marker lights come on, the DRLs go OFF. |
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#12
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On Thu, 10 Mar 2005, Steve wrote:
> > The automatic lighting systems I am used to activate low beam > > headlights, sidelights, and tail lights, day or night. I refer to > > these as DRL's. Does DRL mean something different to you, Daniel? > DRL has a completely different and standardized definition. It refers to > white lights, mounted on the front of the car, that operate whenever the > headlights and other lights are OFF. When the headlights and marker > lights come on, the DRLs go OFF. Your definition is accurate outside North America, but not within North America. In North America, DRLs are allowed to be white, selective yellow, amber or any color in between. They're required to stay on with the parker/marking lights by Canadian law. They're required to turn off with the parker/marking lights by US law, but this provision is not enforced. |
#13
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Daniel J Stern wrote:
>*Full-time steady burning of the front turn signals alone I'm sure you are correct, but my first thought was "you're kidding!" Is there an example of a car in production that does this? One amp non-focused yellow lights in bright sunlight seems useless to me. Please tell me what I'm missing! Toyota MDT in MO |
#14
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"Comboverfish" > wrote in message
oups.com... > Daniel J Stern wrote: >>*Full-time steady burning of the front turn signals alone > > I'm sure you are correct, but my first thought was "you're kidding!" > > Is there an example of a car in production that does this? One amp > non-focused yellow lights in bright sunlight seems useless to me. > Please tell me what I'm missing! > Check out any Chevy/GMC full-size cargo van, they're afflicted with the "damn running lights" like that. |
#15
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Bob M. wrote: > "Comboverfish" > wrote in message > oups.com... > > Daniel J Stern wrote: > >>*Full-time steady burning of the front turn signals alone > > > > I'm sure you are correct, but my first thought was "you're kidding!" > > > > Is there an example of a car in production that does this? One amp > > non-focused yellow lights in bright sunlight seems useless to me. > > Please tell me what I'm missing! > > > > Check out any Chevy/GMC full-size cargo van, they're afflicted with the > "damn running lights" like that. Unless the van is different than the trucks, I'm familiar with the 1999 and up independent Chevy DRL beams. I think those are satisfactory. Plus, they're white, not yellow. Most turn signal housings are yellow, so my ASSumption here regarding D.S. statement is that it would most likely involve a yellow lens, and if not, atleast a yellow bulb. Toyota MDT in MO |
#16
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"Daniel J. Stern" > wrote in message .umich.edu... > > Note that in Canada, DRLs are required to burn until the *headlamps* are > turned on, so DRLs continue to operate when the parking lamps (only) are > switched on. In the US, on the other hand, DRLs are required to extinguish > when the parking lamps are turned on. However, this provision of the law > has not been enforced and so there are millions of noncompliant vehicles > on US roads (they comply with the Canadian "DRLs must stay on with parking > lamps" law). This answers a lot. Typical of the USA to have a number of competing systems and not enforce much of anything. I am a firm believer that proper lighting prevents accidents. Many Americans don't light properly, drive far too fast in bad conditions, and believe that any law which is not enforced (and many that ARE) do not apply to them. |
#17
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On Thu, 10 Mar 2005, Comboverfish wrote:
> >*Full-time steady burning of the front turn signals alone > I'm sure you are correct, but my first thought was "you're kidding!" Is > there an example of a car in production that does this? Su Several Saturns including the Ion Most current-production Cadillacs The last Buick Century The last Olds Intrigue The current Chev/GMC full-size vans '96-'00 Chrysler minivans (in Canada) The '97-up GM minivans (Chev Venture, Pontiac Montana, Olds Silhouette, Saturn Relay, Buick Terrazza) The current Chevrolet Malibu Several current Toyotas (at least in Canada). > One amp non-focused yellow lights in bright sunlight seems useless to > me. Please tell me what I'm missing! Well, you're missing a few things, most notably that light is not measured in amps. it's measured in candela, candlepower, lux or lumens. There is no such thing as "an amp of light". That's because different ways of making light have different levels of efficiency. Except for the fact that they're amber and therefore introduce ambiguity into the front signal system, turn signal DRLs are dandy. They produce just about the perfect amount of light, distributed through just about perfect horizontal and vertical angles, for an effective daytime running light without glare. Now if only they were white (or some color other than amber), they *would* be just about perfect. DS |
#18
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On Thu, 10 Mar 2005, Comboverfish wrote:
> > Check out any Chevy/GMC full-size cargo van, they're afflicted with > > the "damn running lights" like that. > Unless the van is different than the trucks The van is different than the trucks. > I'm familiar with the 1999 and up independent Chevy DRL beams. I think > those are satisfactory. Plus, they're white, not yellow. White on the trucks, amber on the vans. And they're mostly satisfactory from a performance standpoint, but UNsatisfactory from a bulb-life standpoint. GM made a stupid choice of bulb type. > Most turn signal housings are yellow ??? Nowtimes most turn signal "housings" (=lenses) are clear with an amber bulb. |
#19
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Daniel J. Stern wrote:
> Su > > Several Saturns including the Ion > Most current-production Cadillacs > The last Buick Century > The last Olds Intrigue > The current Chev/GMC full-size vans > '96-'00 Chrysler minivans (in Canada) > The '97-up GM minivans (Chev Venture, Pontiac Montana, Olds Silhouette, > Saturn Relay, Buick Terrazza) > The current Chevrolet Malibu > Several current Toyotas (at least in Canada). > > >>One amp non-focused yellow lights in bright sunlight seems useless to >>me. Please tell me what I'm missing! > 93-2002 Firebirds use turn signal DRLs. |
#20
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Daniel J. Stern wrote: > Well, you're missing a few things, most notably that light is not measured > in amps. it's measured in candela, candlepower, lux or lumens. There is no > such thing as "an amp of light". That's because different ways of making > light have different levels of efficiency. Except for the fact that > they're amber and therefore introduce ambiguity into the front signal > system, turn signal DRLs are dandy. They produce just about the perfect > amount of light, distributed through just about perfect horizontal and > vertical angles, for an effective daytime running light without glare. I understand the concept of amperage, light power, and efficiency. I was just making a flip comment on the fact that manufacturers were using what roughly amounts to an 1157 for DRL purposes. I would much prefer series-ed high beams for the extra cost of the relays or module. I'm not a safety nazi but I strongly feel that low output amber light is significantly less noticeable in daylight than headlight style DRL beams. > Now if only they were white (or some color other than amber), >they *would* be just about perfect. Word. Thanks for the info. Especially the list of GMs, er, I mean manufacturers that use turn signal DRLs. Toyota MDT in MO |
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