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What constitutes a DRL has been argued about for over 10 years. Scandinavia has been and possibly continues to be (I don't know for certain) anti the non-Volvo forms of DRL, preferring the headlight version.
What I'm referring to is those European regulations which define that to be called a Daytime Running Light the light must be passive, which LEDs are and headlamps aren't. I'm excluding headlights which may use a new LED technology and obviously cannot be passive. The main reason that the regulations have taken so long to be formed is all the argument and inability for various countries and motoring organisations to agree. The disagreement continues!
i have read literally hundreds of pages of various international studies and commissioned reports. As Hella Deutschland supplied me my DRLs I was keen to establish they would not get me into trouble here in the UK and they haven't. As someone posted earlier, anyone who knows their stuff can easily recognise the difference between a foglight and a DRL. If someone thinks a foglight is a DRL they are plain ignorant.
I understand that the UK proposed that foglights be allowed as DRLs in an interim period, which kind of contradicts the existing use of fogs rules/legislation. But I don't follow all this stuff anymore as I don't need to and have better things to do.