Talk:Selective yellow

message: Please tell me what is in that link that cannot be included in the article. --Legionarius (talk) 19:48, 31 December 2007 (UTC)
replies: text: You're right, per WP:EL the link didn't belong. I re-removed it. --Scheinwerfermann (talk) 20:04, 31 December 2007 (UTC)
replies: text: Much better as a reference. Thanks.--Legionarius (talk) 20:08, 31 December 2007 (UTC)
thread_title: Link

message: Have dug up some more useful sources and links. First off, take a look at page 81 of this French National Assembly record. §36597 has a Mr. Pierre Montastruc asking about regulatory harmonisation of vehicle lighting within the European Economic Community in February 1988. He says, "France is the only country in the European Community that uses yellow headlamps. White headlamps increase visibility for drivers and allows in particular for motorcycles to better be seen. They do not cause more glare than yellow headlights when they are aimed correctly. Are there plans to harmonise (French) vehicle lighting regulations with those of our European partners?".  The response comes back "The choice and the retention of selective yellow for vehicle headlamps in France is guided by reasons of roadway safety. Experiments conducted in laboratories have shown that the selective yellow lighting produces less glare than white light does, at equal levels of illumination, for observers in conditions of glare corresponding to configurations usually encountered on the road. Furthermore, selective yellow light does not give rise to the annoying phenomenon of diffraction in rain or fog. This latter feature has also led to an almost universal use of yellow light in fog conditions for roadway and airport lighting. Moreover, the minimal filtration loss involved in using yellow rather than white, about 15%, is not the determining factor (in headlamp performance); Other parameters have a bigger effect on the real illumination; a 10% variation in supply voltage for example can vary the emitted light flux by 30%, the state of cleanliness of the headlamps can cut headlamp output in half, and a headlamp with a tungsten bulb produces 60% less light than a headlamp with a halogen bulb. Harmonisation within the EEC is accomplished since 1976 by a directive
leaving the choice of headlamp colour to member states as long as all Community requirements for the approval of vehicles are met." 
So that was the French government position as of 1988. Given the time scale on which pan-European harmonisation agreements are agreed and put into force, that would have been the timeframe during which the discussions were taking place in earnest in GRE and EC meetings. I suspect but cannot (yet) document that this remained the French government position right up through the end of the yellow-headlamp mandate, but given the voting structure of GRE and EC, France would quite easily have been outvoted by white-headlamp countries and not helped by any abstentions.
I did discover something very interesting about the Principality of Monaco. Take a look here at the top line. This is the road regulatory code for Monaco last updated in 2008. I can find no evidence of any newer revision, corrigendum, addendum, or amendment. Now take a look at the high beam headlamp requirement and the low beam headlamp requirement. Notice anything missing…like an allowance for white light, for example? At least on the books, it seems Monaco still requires headlamps to emit yellow light. —Scheinwerfermann T·C21:00, 29 July 2012 (UTC)
thread_title: More

message: This article(http://www.dadrl.org.uk/health.html) states :
"Blue and violet light has high energy and high phototoxicity  causing temporal summations, increased glare, straylight, reduced contrast vision and Chromatic Aberration.
Within the eye, there are no blue cones in the central retinal area, blue rays focus in vitreous body therefore blue light does not improve central vision.
A Yellow Filter (420 - 450 nm cut off headlights, streetlights etc.) might improve contrast vision, reduce glare and straylight."
This info could be added to improve this page.
Red banner1917 (talk) 03:38, 14 February 2014 (UTC)
thread_title:  Article that supports yellow