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Thread: Driving Lights and Fog Lights

  1. #1
    Full Member Teamtom's Avatar
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    Default Driving Lights and Fog Lights

    Hi all,

    Me and Jay Kay today were having a chat about the difference between Driving Lights and Fog lights.

    Looked on many forums and could not find a "set in stone" answer.

    Can anyone assist?
    Rubbin'z racing Harry!


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    Quote Originally Posted by Teamtom View Post
    Hi all,

    Me and Jay Kay today were having a chat about the difference between Driving Lights and Fog lights.

    Looked on many forums and could not find a "set in stone" answer.

    Can anyone assist?
    Hi Teamtom

    I seem to remember from a forum somewhere (here?) that driving lights only illuminate with full beam, but
    saddo/selfish/stupid/lazy/fog (delete as appropriate ) lights work with just sidelights or headlights.

    neilrj

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    Full Member Teamtom's Avatar
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    Vehicle : Vectra C Hatch

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    Default

    Thanks neil,


    does anyone know where i can find construction details for motor vehicle.


    also if driving lights may only appear when on full beam then how do Audi get around it with their LED strips?
    Rubbin'z racing Harry!


  4. #4
    Regular Member Ste's Avatar
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    Driving lights have more of a 'beam' than the more dispersed pattern that fog lights produce.

  5. #5
    Regular Member SRimonkey's Avatar
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    think i remember reading on a cruisemidlands thread that driving lights are a certain hight from the ground.......ie that fog lights are not,as in much lower.....i know someone got away with arguing the point with a copper same as i did about neon`s not being illegal........they just wasn`t legal.....go figure,got me outta trouble tho

  6. #6
    Full Member Teamtom's Avatar
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    Vehicle : Vectra C Hatch

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    just found some info about "RUNNING LIGHTS"


    requirements relating to obligatory dim-dip devices and running lamps
    • 1. A dim-dip device fitted to satisfy regulation 18 shall cause light to be emitted from the dipped-beam filament of each obligatory dipped-beam headlamp, each such light having, so far as is practicable, an intensity of between 10 and 20 per cent of the intensity of the normal dipped beam.


    • 2. Running lamps fitted to satisfy regulation 18 shall be in the form of a matched pair of front lamps, each of which-


      • (a) is fitted in a position in which an obligatory front position lamp may lawfully be fitted, and



      • (b) is capable of emitting white light to the front having an intensity of not less than 200 candelas, measured from directly in front of the centre of the lamp in a direction parallel to the longitudinal axis of the vehicle, and of not more than 800 candelas in any direction.


    • 3. The electrical connections to the obligatory dim-dip device or running lamps, as the case may be, shall be such that the light output specified in paragraph 1 or 2 above is emitted automatically whenever-


      • (a) the engine of the vehicle is running, or the key or devices which control the starting or stopping of the engine are in the normal position for driving the vehicle, and


        • (i) the obligatory position lamps, but not the headlamps, of the vehicle are switched on, or



        • (ii) the obligatory position lamps are switched off.
    Rubbin'z racing Harry!


  7. #7
    Regular Member m8internet's Avatar
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    Dipped headlamps - full range dipped
    Full beam headlamps - full range undipped
    Driving lamps - additional lamps that provide a small fill to full beam
    Fog lamps - additional lamps that provide lower dipped and spread beam

    Driving lamps are only of use on level unlit roads where full beam can be used
    Hence why offroad and rally cars have them, as each additional lamp fills in the missing areas

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    Quote Originally Posted by Teamtom View Post
    Thanks neil,


    does anyone know where i can find construction details for motor vehicle.


    also if driving lights may only appear when on full beam then how do Audi get around it with their LED strips?
    Hi Teamtom

    Real driving lights are just extra headlights, just like the spotlights on rally cars and are to assist with seeing
    further so can only come on and go off with full beam - otherwise they'd be left on just like foglights...

    The Audi striplights are just pimping and are probably just classed as side markers or daylight running lights,
    no idea where you'd actually find the C+U details for cars to check specs, bits are online but I've never
    found a complete list - road lighting will get most returns.

    Try http://www.opsi.gov.uk/si/si1989/Uksi_19891796_en_1.htm
    but this was updated in 2005 so good luck searching...

    neilrj

  9. #9
    Full Member Teamtom's Avatar
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    Default

    That's where i got my info from mate, cheers anyway

    Also says in the info I found, The use of "running lamps" may be partaken. Running lamps if used in this state must be automatically illuminated all the time the car is running if or if not any other lights are illuminated.


    like you've stated in the "pimpin" factor of manufacture such as Audi as daylight running light. Aparently these are to meet EU regs due to most EU countries requiring daylight running lights. First thoughts on this are quite a big impact on economy and fuel consumption which is why these daytime running lights are becoming LED's which are much more economic and more reliable

    http://en.wikipedia.org/wiki/Daytime_running_lamp

    And a picture to add to the discussion
    Last edited by Teamtom; 7th June 2009 at 23:12.
    Rubbin'z racing Harry!


  10. #10
    Full Member Teamtom's Avatar
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    Just found a kit for sale from halfords Daylight running lights.

    http://www.halfords.com/webapp/wcs/s...egoryId_165688

    includes automatic switching unit which turns the lights on automatically when the engine starts
    Rubbin'z racing Harry!


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