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(Transfered form [Talk:DieSwartzPunkt] where it was incorrectly posted.)
Your assertions about halogen headlamps being unavailable for use in France because of that country's requirement for Selective yellow light were unsupportable because they were wholly incorrect. In fact, a great deal of the development work and initial commercialization of halogen headlamps took place in France. Yellow glass lenses, yellow reflector coatings, and yellow internal filters covering the bulb were among the techniques used to obtain the required yellow light color in conjunction with a colorless halogen bulb. Please refrain from inserting guesses and assumptions into articles, won't you? Thanks. — Scheinwerfermann T· C 19:30, 17 May 2012 (UTC)
Hello, I have observed that since this century turned, new cars have had headlamp lenses made out of plastic. Before headlamp lenses were made out of thick glass that reminded me of Pyrex cooking vessels intended for use inside an oven. Is it true that it was in fact heat-resistant borosilicate glass? What is the plastic in use nowadays? I suppose it is polycarbonate plastic, but is it regular or somehow treated/coated? I would want answers to these questions in the article. Also, were the transition to plastic lenses possible only after halogen lamps became history? I believe that halogen lamps emitted so much heat that polycarbonate would have melted. So, if the transition was only possible because of technological development in lamps, and a consequence of this (better efficiency, less heat), please point it out in the article. Also, I suppose the use of plastic resulted in small weight savings. Were there monetary savings? Are there some drawbacks in plastic? -- 91.157.12.243 ( talk) 13:16, 21 September 2012 (UTC)
These need references to validate their correctness. Some guy posting on the usenet is no different form quoting some person one met from the bar, thus not appropriate reference for wikipedia according to WP:RS Cantaloupe2 ( talk) 21:01, 2 November 2012 (UTC)
Sorry to butt in, but the wiki policies you constantly try to use as the basis for the reasoning behind your edits are not the definitive/last say in how an article is set up. Where the content of an article is inappropriate and unsupported for ruling by a policy, those policies impede the progress of an article rather than help it. They are to be used as guidelines rather than as strict adhered rules. Regarding the content of the article, I think this article is written in a historical/essay-like style similar to the styles in historical articles such as the one on the featured page today, so objecting on the style of the writing is not a reason for blanking. - M0rphzone ( talk) 06:42, 3 November 2012 (UTC)
Anyways, like I said before, third-party news sites are not always reliable or accurate for topics like this that may be obscure/specific in technicality/historical details. What we need are books, rather than online sources as they do not provide adequate information. I think Google Books has some books that address the uncited parts of this article. - M0rphzone ( talk) 17:57, 4 November 2012 (UTC)
The statement "The correlated colour temperature of HID headlamp lamps is between 4100K and 4400K" has an issue. The studies done at the time may have only investigated the ones in those range, however HID lamps are made in anything from 3,000 to 10,000K+ Cantaloupe2 ( talk) 16:46, 4 November 2012 (UTC)
On the world of en.wikipedia.org, does American spelling always prevail over British spelling? If it per policy to "Americanize"? if so never mind, but otherwise, please provide rationale. I'm referring to recent edit by M0rphzone to go through and changeover all British spelling to American spelling. Cantaloupe2 ( talk) 19:31, 4 November 2012 (UTC)
I'm removing them, because I've found authoritative sources on the matter on hand,which is the legality in the US. It's unnecessary to add some website which says the same thing where one author Daniel Stern has unilateral say in what gets on there. The hella picture clearly refers to the US, but does not make it explicitly so. The NHTSA.gov source is clearer in breadth of application and is the authoritative source on legality in the US. Cantaloupe2 ( talk) 21:05, 4 November 2012 (UTC)
- "For government enforcement action, its unnecessary to echo back and say "SEMA said NHTSA did this" when we have direct link to NHTSA that says they've done so" (Cantaloupe)
Cantaloupe, your edit comment: "lining up before formatting queen comes waltzing in" violates WP:CIVILITY. If you want to continue editing this article, I'd recommend you not making snide remarks like a 12 year old. - M0rphzone ( talk) 21:45, 4 November 2012 (UTC)
67.151.108.178 US Walnut, California, United States,PAETEC Communications,K2 Motors
I've reverted several changes such as this as it was discovered that it was the company itself astroturfing based on IP lookup Cantaloupe2 ( talk) 21:36, 29 November 2012 (UTC)
Its good to leave your lights on because the alternator in your car needs to recharge your battery. People don't know this but if a battery isnt charged for a long time, all it does is age. You need a battery that recharges or parts of it will become dead. Leaving your lights on while the engine is on is a good thing at times. — Preceding unsigned comment added by 69.255.25.193 ( talk) 02:27, 29 July 2013 (UTC)
Apparently this commentor has no idea how automotive electrical systems work. Yes it is correct that if you let a bettery just sit idle for a long time it will discharge and the cells will decay. However when the vehicle is running with the lights off the car's ignition system (distributer/coil/spark plugs etc) will still use the battery. Besides most cars from the past 30 years have at least electronic fuel injection and fuel pump controled by the ECU. Not to mention the radio, instrument cluster lights, infotainment systems, electronic drivers aids (traction control, abs, tpms) — Preceding unsigned comment added by 72.11.91.140 ( talk) 02:06, 21 April 2014 (UTC)
In Australia, the device itself is called a headlight and the beam of light is called a headlight beam. This is contrary to the article claiming that everywhere in the world, the device is only ever properly called a "headlamp" and the beam of light is always properly called a "headlight". Therefore, the sentence:
"While it is common for the term headlight to be used interchangeably in informal discussion, headlamp is the term for the device itself, while headlight properly refers to the beam of light produced and distributed by the device."
Should either be removed because of a lack of evidence to suggest this outrageous claim to global language, or should be corrected with more accurate information so as to not mislead readers. — Preceding unsigned comment added by 115.64.159.41 ( talk) 11:10, 13 December 2012 (UTC)
This is an excellent work! My complements to all! I noticed that this Headlamp article in the first paragraph of the Tungsten-Halogen section mentions light output power in Lumens" then in "candella" and in the second paragraph in lumens. Are these referecnces to the same standards? Why the change in units? or perhaps why not have both units listed for each reference as some might be more comfortable in one set of units and one in the other? I personally prefer both as i am trying to learn more about this subject and am finding info in both units and want to have a consistent reference in BOTH units.
Thanks, Glennndavis ( talk) 14:42, 15 April 2013 (UTC)
The "Increased safety" section says "Automotive HID lamps offer about 3000 lumens and 90 Mcd/m2 versus 1400 lumens and 30 Mcd/m2 offered by halogen lamps." I don't think either of those luminances can be correct for any realistic throw distance. For example: Given a perfect reflecting diffuser, the HID case requires concentrating the light into an area of only (3000/pi/90,000,000 =) 0.0000106 m2, which may be even smaller than the area of the arc between the electrodes.
Please check those luminances and specify the distance at which the values are obtained.-- Therealdp ( talk) 04:27, 28 September 2014 (UTC)
WOW, WOW, somebody did some real digging to come up with that French legislative record from 1936 announcing the start of yellow headlamp requirements in France! I have long wondered what inspired the French to enact that law, and had heard a variety of explanations but always without documented proof. I made some adjustments (I think/hope they are improvements) to the "light colour" and "yellow light" sections of the article. From the Selective yellow article's talk page I pulled interesting citations to current regulations requiring yellow front lights on all vehicles in Monaco (I kind of doubt this is enforced -- yellow lights specifically for one tiny country just seems very unlikely -- but I have no idea how to go about finding out). Also, I have tagged some assertions that need support. I deleted a claim that yellow headlamps are allowed throughout Europe "on vehicles that originally had them". If someone can find a reliable citation backing that up, let's put it back in, but I have pored through a large amount of vehicle regulatory code from a bunch of European countries, and I have yet to find anything reserving yellow lights for only those vehicles that originally were equipped with yellow lights. I can't say for 100% sure exactly what the whole situation is, because I haven't looked at the codes from each and every European country. Obviously some countries permit either color, that's been the case for many years. France's current vehicle code says "white or yellow" (see here and note no limitation for yellow lights only being allowed if the vehicle was originally equipped) while Germany's says "Only white" (see here). I would like to be able to tabulate a complete list of which countries permit/prohibit yellow headlights, but that would be a huge task. Anyway, again, WELL DONE to whomever found that French document! — Preceding unsigned comment added by 24.87.69.125 ( talk) 06:00, 3 November 2014 (UTC)
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Cheers. — cyberbot II Talk to my owner:Online 01:34, 19 October 2015 (UTC)
The first sentence in the "Automatic beam switching" section says:
"Even when the high beam is prohibited by the presence of other drivers on the road, drivers generally do leave them on all the time.<ref>Mefford, M.L.; Flannagan, M.J.; Bogard, S.E. (2006).
"Real-world use of high-beam headlamps" (PDF). University of Michigan Transportation Research Institute. Retrieved 2009-02-16. {{
cite journal}}
: Cite journal requires |journal=
(
help)CS1 maint: multiple names: authors list (
link)</ref>".
This claim is not supported by the cited reference, which pretty much says the opposite ("The results indicate that high-beam headlamp use is low"). Even if it is true in the USA, it is not true in other parts of the world and certainly not in the UK, where it is rare for drivers not to dip their lights when there is oncoming traffic. 90.155.73.34 ( talk) 19:42, 4 May 2016 (UTC)
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From German Wikipedia:
From the web:
Thanks. -- Alexander.stohr ( talk) 15:19, 13 July 2016 (UTC)
Something we should definitely add is a section about the "smart" headlights developed at Carnegie Mellon's cs department. I should really add it myself, but because I'm an idiot, if I never get around to it, I wrote a blog post about it that may be of use to some other wikipedian. Test35965 ( talk) 02:32, 28 September 2016 (UTC)
This section of the article contains no citations/references. Its information isn't complete, and therefore isn't correct; it claims HIR bulbs all have a reflective coating, but that's not true. There are two "HIR" bulb specifications: HIR1 (also called "9011") and HIR2 (also called "9012"). The original designs of these bulbs, by General Electric, did have an infrared-reflective coating on them. So did the next versions, by Toshiba-Harrison. But the actual legal technical specifications for these bulbs do not require or necessitate an infrared reflective coating. All they do is specify the parameters of the bulb: how much light it's supposed to put out, how much power it's allowed to draw, and all the physical dimensions and markings on the base, etc. It's up to the manufacturer to decide how to meet the requirements. "HIR1" and "HIR2" doesn't necessarily mean the bulb has (or has to have) a coating, it's just the name of the bulb. Most (or all?) HIR1 bulbs and some HIR2 bulbs currently manufactured by makers like Philips, Narva, Voszla, General Electric, and Sylania/Osram do NOT have a coating on them, and they meet all the specs just the same. Those are the facts, and I have technical literature to prove it, but I don't yet understand how to make sure this literature is acceptable, and I don't know how to put them in the article correctly. I don't want to take a chance on messing something up, so if someone else can please improve this section, with updated/correct information and appropriate sources, please go ahead. Thanks. 78.131.30.180 ( talk) 15:45, 22 September 2017 (UTC)
No information AT ALL on adaptive driving beam in this article? Seriously? Not a word? It's a hugely revolutionary advance in vehicle lighting, and this article is silent on it. Come on, can't we do better than that??? 78.131.30.180 ( talk) 15:47, 22 September 2017 (UTC)
CZmarlin, in this edit you added text stating that France's selective yellow headlamps were ended at the request of the French auto industry. Looking at your source, it goes into more detail, claiming that French automakers felt the French requirement put them at a competitive disadantage because they had to make yellow headlights for France and white ones for everywhere else. There are problems with that idea. For one thing, this is directly contradicted by the very next assertion, which is backed by a citation of the actual French law, which is probably more authoritative than "nth"-hand information in a non-technical book written by an author with an agenda. For another thing, the claim doesn't make sense. The requirement was that all vehicles in France have the yellow lights. It wasn't just for French-made cars, it was for all vehicles driven in France, no matter what brand they were or where they were made, so every car company had to put different lights or use different bulbs for the French market...how would that put the French makers at any kind of a competitive disadvantage? This feels like it might be yet another one of the surprisingly many folktales that have been dreamt up to "explain" France's yellow lights—military tactics, different road paving materials, a variety of claims about light penetrating fog, etc. I don't mean to diss the source you found as definitely/necessarily wrong, but there are reasons to suspect it might not have the facts right. The author doesn't give any citations to support the claims made in the text, and the document he mentions ( Council Directive 91/663) makes no mention at all of French automakers requesting this change. Moreover, it doesn't say what he claims it says. The preamble says the colour of headlights will be required to be white only, but it is clearly in context of what would be required for EEC type approval, not what would be required for entry or use in any particular country, and Article 3 of that document says as of 1 January 1993 an EC member state would not be permitted to refuse entry or type-approval of a vehicle that meets the lighting standards set forth in the document. That is: France would no longer be able to refuse entry or EC type approval to a vehicle with white headlights. That does not mean France couldn't continue to allow the yellow lights, and the citation here in this article to current French legal code points to that understanding: France still allows yellow (with no apparent vehicle production or registration date cutoff), but white is also allowed. I think it would be good if another source could be found to corroborate or definitively debunk yours. But no matter what combination of terms I search on, all searches seem to point back to that one solitary source you found, or to this article's incorporation of that source. Not a good feedback loop, how do we exit it? Pogorrhœa ( talk) 05:06, 27 July 2018 (UTC)
"Burner" is sometimes used deep in the rabbit-warrens of engineering departments to refer specifically to the part of the bulb/lamp comprising the glass or quartz capsule and its internal components (gas fill, filament and filament supports/shields in incandescent bulbs; electrodes, gas fill and halides in gas discharge bulbs). It's not a term in widespread general use. The complete item with the burner, the base (or cap), the blacktop (if present), and any other components is the bulb, the lamp, or the light source. Proof? Yeah, there's a lot of it: here and here and here (and more to the point, here), here, here, here, here, here, here, here, here, here, here, and here, just for a selection of government-regulation, technical-standard, and industry refs. 173.180.13.37 ( talk) 00:48, 6 April 2021 (UTC)
The article does currently include a mention of the first type of dipping headlamps, but nothing about whether one light was dipped or both. In the UK up until the mid-1950s, the anti-dazzle fittings on all cars worked by completely extinguishing the off-side headlight and only deflecting the near-side beam (Autocar 16 January 1948). This was changed at some as yet undetermined point, with the later process, which deflected the beam on both headlights referred to as "double dipping". I'm not sure if this was the same in other countries, but it was a significant change at the time in the UK and would merit inclusion if anyone has more specific details of this development in other countries. Mighty Antar ( talk) 14:27, 26 May 2022 (UTC)
No mention is made of headlamps on locomotives etc Peter Horn User talk 17:08, 27 October 2022 (UTC)
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(Transfered form [Talk:DieSwartzPunkt] where it was incorrectly posted.)
Your assertions about halogen headlamps being unavailable for use in France because of that country's requirement for Selective yellow light were unsupportable because they were wholly incorrect. In fact, a great deal of the development work and initial commercialization of halogen headlamps took place in France. Yellow glass lenses, yellow reflector coatings, and yellow internal filters covering the bulb were among the techniques used to obtain the required yellow light color in conjunction with a colorless halogen bulb. Please refrain from inserting guesses and assumptions into articles, won't you? Thanks. — Scheinwerfermann T· C 19:30, 17 May 2012 (UTC)
Hello, I have observed that since this century turned, new cars have had headlamp lenses made out of plastic. Before headlamp lenses were made out of thick glass that reminded me of Pyrex cooking vessels intended for use inside an oven. Is it true that it was in fact heat-resistant borosilicate glass? What is the plastic in use nowadays? I suppose it is polycarbonate plastic, but is it regular or somehow treated/coated? I would want answers to these questions in the article. Also, were the transition to plastic lenses possible only after halogen lamps became history? I believe that halogen lamps emitted so much heat that polycarbonate would have melted. So, if the transition was only possible because of technological development in lamps, and a consequence of this (better efficiency, less heat), please point it out in the article. Also, I suppose the use of plastic resulted in small weight savings. Were there monetary savings? Are there some drawbacks in plastic? -- 91.157.12.243 ( talk) 13:16, 21 September 2012 (UTC)
These need references to validate their correctness. Some guy posting on the usenet is no different form quoting some person one met from the bar, thus not appropriate reference for wikipedia according to WP:RS Cantaloupe2 ( talk) 21:01, 2 November 2012 (UTC)
Sorry to butt in, but the wiki policies you constantly try to use as the basis for the reasoning behind your edits are not the definitive/last say in how an article is set up. Where the content of an article is inappropriate and unsupported for ruling by a policy, those policies impede the progress of an article rather than help it. They are to be used as guidelines rather than as strict adhered rules. Regarding the content of the article, I think this article is written in a historical/essay-like style similar to the styles in historical articles such as the one on the featured page today, so objecting on the style of the writing is not a reason for blanking. - M0rphzone ( talk) 06:42, 3 November 2012 (UTC)
Anyways, like I said before, third-party news sites are not always reliable or accurate for topics like this that may be obscure/specific in technicality/historical details. What we need are books, rather than online sources as they do not provide adequate information. I think Google Books has some books that address the uncited parts of this article. - M0rphzone ( talk) 17:57, 4 November 2012 (UTC)
The statement "The correlated colour temperature of HID headlamp lamps is between 4100K and 4400K" has an issue. The studies done at the time may have only investigated the ones in those range, however HID lamps are made in anything from 3,000 to 10,000K+ Cantaloupe2 ( talk) 16:46, 4 November 2012 (UTC)
On the world of en.wikipedia.org, does American spelling always prevail over British spelling? If it per policy to "Americanize"? if so never mind, but otherwise, please provide rationale. I'm referring to recent edit by M0rphzone to go through and changeover all British spelling to American spelling. Cantaloupe2 ( talk) 19:31, 4 November 2012 (UTC)
I'm removing them, because I've found authoritative sources on the matter on hand,which is the legality in the US. It's unnecessary to add some website which says the same thing where one author Daniel Stern has unilateral say in what gets on there. The hella picture clearly refers to the US, but does not make it explicitly so. The NHTSA.gov source is clearer in breadth of application and is the authoritative source on legality in the US. Cantaloupe2 ( talk) 21:05, 4 November 2012 (UTC)
- "For government enforcement action, its unnecessary to echo back and say "SEMA said NHTSA did this" when we have direct link to NHTSA that says they've done so" (Cantaloupe)
Cantaloupe, your edit comment: "lining up before formatting queen comes waltzing in" violates WP:CIVILITY. If you want to continue editing this article, I'd recommend you not making snide remarks like a 12 year old. - M0rphzone ( talk) 21:45, 4 November 2012 (UTC)
67.151.108.178 US Walnut, California, United States,PAETEC Communications,K2 Motors
I've reverted several changes such as this as it was discovered that it was the company itself astroturfing based on IP lookup Cantaloupe2 ( talk) 21:36, 29 November 2012 (UTC)
Its good to leave your lights on because the alternator in your car needs to recharge your battery. People don't know this but if a battery isnt charged for a long time, all it does is age. You need a battery that recharges or parts of it will become dead. Leaving your lights on while the engine is on is a good thing at times. — Preceding unsigned comment added by 69.255.25.193 ( talk) 02:27, 29 July 2013 (UTC)
Apparently this commentor has no idea how automotive electrical systems work. Yes it is correct that if you let a bettery just sit idle for a long time it will discharge and the cells will decay. However when the vehicle is running with the lights off the car's ignition system (distributer/coil/spark plugs etc) will still use the battery. Besides most cars from the past 30 years have at least electronic fuel injection and fuel pump controled by the ECU. Not to mention the radio, instrument cluster lights, infotainment systems, electronic drivers aids (traction control, abs, tpms) — Preceding unsigned comment added by 72.11.91.140 ( talk) 02:06, 21 April 2014 (UTC)
In Australia, the device itself is called a headlight and the beam of light is called a headlight beam. This is contrary to the article claiming that everywhere in the world, the device is only ever properly called a "headlamp" and the beam of light is always properly called a "headlight". Therefore, the sentence:
"While it is common for the term headlight to be used interchangeably in informal discussion, headlamp is the term for the device itself, while headlight properly refers to the beam of light produced and distributed by the device."
Should either be removed because of a lack of evidence to suggest this outrageous claim to global language, or should be corrected with more accurate information so as to not mislead readers. — Preceding unsigned comment added by 115.64.159.41 ( talk) 11:10, 13 December 2012 (UTC)
This is an excellent work! My complements to all! I noticed that this Headlamp article in the first paragraph of the Tungsten-Halogen section mentions light output power in Lumens" then in "candella" and in the second paragraph in lumens. Are these referecnces to the same standards? Why the change in units? or perhaps why not have both units listed for each reference as some might be more comfortable in one set of units and one in the other? I personally prefer both as i am trying to learn more about this subject and am finding info in both units and want to have a consistent reference in BOTH units.
Thanks, Glennndavis ( talk) 14:42, 15 April 2013 (UTC)
The "Increased safety" section says "Automotive HID lamps offer about 3000 lumens and 90 Mcd/m2 versus 1400 lumens and 30 Mcd/m2 offered by halogen lamps." I don't think either of those luminances can be correct for any realistic throw distance. For example: Given a perfect reflecting diffuser, the HID case requires concentrating the light into an area of only (3000/pi/90,000,000 =) 0.0000106 m2, which may be even smaller than the area of the arc between the electrodes.
Please check those luminances and specify the distance at which the values are obtained.-- Therealdp ( talk) 04:27, 28 September 2014 (UTC)
WOW, WOW, somebody did some real digging to come up with that French legislative record from 1936 announcing the start of yellow headlamp requirements in France! I have long wondered what inspired the French to enact that law, and had heard a variety of explanations but always without documented proof. I made some adjustments (I think/hope they are improvements) to the "light colour" and "yellow light" sections of the article. From the Selective yellow article's talk page I pulled interesting citations to current regulations requiring yellow front lights on all vehicles in Monaco (I kind of doubt this is enforced -- yellow lights specifically for one tiny country just seems very unlikely -- but I have no idea how to go about finding out). Also, I have tagged some assertions that need support. I deleted a claim that yellow headlamps are allowed throughout Europe "on vehicles that originally had them". If someone can find a reliable citation backing that up, let's put it back in, but I have pored through a large amount of vehicle regulatory code from a bunch of European countries, and I have yet to find anything reserving yellow lights for only those vehicles that originally were equipped with yellow lights. I can't say for 100% sure exactly what the whole situation is, because I haven't looked at the codes from each and every European country. Obviously some countries permit either color, that's been the case for many years. France's current vehicle code says "white or yellow" (see here and note no limitation for yellow lights only being allowed if the vehicle was originally equipped) while Germany's says "Only white" (see here). I would like to be able to tabulate a complete list of which countries permit/prohibit yellow headlights, but that would be a huge task. Anyway, again, WELL DONE to whomever found that French document! — Preceding unsigned comment added by 24.87.69.125 ( talk) 06:00, 3 November 2014 (UTC)
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The first sentence in the "Automatic beam switching" section says:
"Even when the high beam is prohibited by the presence of other drivers on the road, drivers generally do leave them on all the time.<ref>Mefford, M.L.; Flannagan, M.J.; Bogard, S.E. (2006).
"Real-world use of high-beam headlamps" (PDF). University of Michigan Transportation Research Institute. Retrieved 2009-02-16. {{
cite journal}}
: Cite journal requires |journal=
(
help)CS1 maint: multiple names: authors list (
link)</ref>".
This claim is not supported by the cited reference, which pretty much says the opposite ("The results indicate that high-beam headlamp use is low"). Even if it is true in the USA, it is not true in other parts of the world and certainly not in the UK, where it is rare for drivers not to dip their lights when there is oncoming traffic. 90.155.73.34 ( talk) 19:42, 4 May 2016 (UTC)
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Cheers.— cyberbot II Talk to my owner:Online 23:40, 26 May 2016 (UTC)
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Cheers.— cyberbot II Talk to my owner:Online 10:33, 4 July 2016 (UTC)
From German Wikipedia:
From the web:
Thanks. -- Alexander.stohr ( talk) 15:19, 13 July 2016 (UTC)
Something we should definitely add is a section about the "smart" headlights developed at Carnegie Mellon's cs department. I should really add it myself, but because I'm an idiot, if I never get around to it, I wrote a blog post about it that may be of use to some other wikipedian. Test35965 ( talk) 02:32, 28 September 2016 (UTC)
This section of the article contains no citations/references. Its information isn't complete, and therefore isn't correct; it claims HIR bulbs all have a reflective coating, but that's not true. There are two "HIR" bulb specifications: HIR1 (also called "9011") and HIR2 (also called "9012"). The original designs of these bulbs, by General Electric, did have an infrared-reflective coating on them. So did the next versions, by Toshiba-Harrison. But the actual legal technical specifications for these bulbs do not require or necessitate an infrared reflective coating. All they do is specify the parameters of the bulb: how much light it's supposed to put out, how much power it's allowed to draw, and all the physical dimensions and markings on the base, etc. It's up to the manufacturer to decide how to meet the requirements. "HIR1" and "HIR2" doesn't necessarily mean the bulb has (or has to have) a coating, it's just the name of the bulb. Most (or all?) HIR1 bulbs and some HIR2 bulbs currently manufactured by makers like Philips, Narva, Voszla, General Electric, and Sylania/Osram do NOT have a coating on them, and they meet all the specs just the same. Those are the facts, and I have technical literature to prove it, but I don't yet understand how to make sure this literature is acceptable, and I don't know how to put them in the article correctly. I don't want to take a chance on messing something up, so if someone else can please improve this section, with updated/correct information and appropriate sources, please go ahead. Thanks. 78.131.30.180 ( talk) 15:45, 22 September 2017 (UTC)
No information AT ALL on adaptive driving beam in this article? Seriously? Not a word? It's a hugely revolutionary advance in vehicle lighting, and this article is silent on it. Come on, can't we do better than that??? 78.131.30.180 ( talk) 15:47, 22 September 2017 (UTC)
CZmarlin, in this edit you added text stating that France's selective yellow headlamps were ended at the request of the French auto industry. Looking at your source, it goes into more detail, claiming that French automakers felt the French requirement put them at a competitive disadantage because they had to make yellow headlights for France and white ones for everywhere else. There are problems with that idea. For one thing, this is directly contradicted by the very next assertion, which is backed by a citation of the actual French law, which is probably more authoritative than "nth"-hand information in a non-technical book written by an author with an agenda. For another thing, the claim doesn't make sense. The requirement was that all vehicles in France have the yellow lights. It wasn't just for French-made cars, it was for all vehicles driven in France, no matter what brand they were or where they were made, so every car company had to put different lights or use different bulbs for the French market...how would that put the French makers at any kind of a competitive disadvantage? This feels like it might be yet another one of the surprisingly many folktales that have been dreamt up to "explain" France's yellow lights—military tactics, different road paving materials, a variety of claims about light penetrating fog, etc. I don't mean to diss the source you found as definitely/necessarily wrong, but there are reasons to suspect it might not have the facts right. The author doesn't give any citations to support the claims made in the text, and the document he mentions ( Council Directive 91/663) makes no mention at all of French automakers requesting this change. Moreover, it doesn't say what he claims it says. The preamble says the colour of headlights will be required to be white only, but it is clearly in context of what would be required for EEC type approval, not what would be required for entry or use in any particular country, and Article 3 of that document says as of 1 January 1993 an EC member state would not be permitted to refuse entry or type-approval of a vehicle that meets the lighting standards set forth in the document. That is: France would no longer be able to refuse entry or EC type approval to a vehicle with white headlights. That does not mean France couldn't continue to allow the yellow lights, and the citation here in this article to current French legal code points to that understanding: France still allows yellow (with no apparent vehicle production or registration date cutoff), but white is also allowed. I think it would be good if another source could be found to corroborate or definitively debunk yours. But no matter what combination of terms I search on, all searches seem to point back to that one solitary source you found, or to this article's incorporation of that source. Not a good feedback loop, how do we exit it? Pogorrhœa ( talk) 05:06, 27 July 2018 (UTC)
"Burner" is sometimes used deep in the rabbit-warrens of engineering departments to refer specifically to the part of the bulb/lamp comprising the glass or quartz capsule and its internal components (gas fill, filament and filament supports/shields in incandescent bulbs; electrodes, gas fill and halides in gas discharge bulbs). It's not a term in widespread general use. The complete item with the burner, the base (or cap), the blacktop (if present), and any other components is the bulb, the lamp, or the light source. Proof? Yeah, there's a lot of it: here and here and here (and more to the point, here), here, here, here, here, here, here, here, here, here, here, and here, just for a selection of government-regulation, technical-standard, and industry refs. 173.180.13.37 ( talk) 00:48, 6 April 2021 (UTC)
The article does currently include a mention of the first type of dipping headlamps, but nothing about whether one light was dipped or both. In the UK up until the mid-1950s, the anti-dazzle fittings on all cars worked by completely extinguishing the off-side headlight and only deflecting the near-side beam (Autocar 16 January 1948). This was changed at some as yet undetermined point, with the later process, which deflected the beam on both headlights referred to as "double dipping". I'm not sure if this was the same in other countries, but it was a significant change at the time in the UK and would merit inclusion if anyone has more specific details of this development in other countries. Mighty Antar ( talk) 14:27, 26 May 2022 (UTC)
No mention is made of headlamps on locomotives etc Peter Horn User talk 17:08, 27 October 2022 (UTC)