Headlight melted

Discussion in 'Parallel Universe' started by Air0ne, May 17, 2013.

  1. JRWooden

    JRWooden Long timer

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    This is just a stupid guy's ( me )
    opinion, but if the ground wire was too small then it would add additional resistance to the circuit. If it did so the current draw by the bulb/wiring would be REDUCED ... since heating is proportional to (the square of the) current and the current is now lower ... I'm having trouble seeing this ... :huh
  2. dpm

    dpm Been here awhile

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    Agree. The lifetime of a halogen bulb decreases with increasing voltage. All a series resistance does is drop a little voltage.

    Now if that resistance is at a point rather than spread out along a wire (say a loose connection) then that concentrated heating effect causes more issues- hence burnt sockets were loose to begin with...
  3. theGSrider

    theGSrider n00b

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  4. theGSrider

    theGSrider n00b

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    I have done some temperature measurements with the low beam OEM bulb and my 55W HID bulb. I inserted the external wired probe of an in/out thermometer through the high beam bulb hole and left it there right next to the low beam bulb.

    From cold start, the T° of the OEM bulb reaches 56°C in 3 minutes, then I cut the engine.

    The 55W HID reaches 53°C in 3 minutes.

    It doesn't seem to me that HID bulbs run much colder than halogens...
    I'll try up to 5 minutes (standing still) with both bulbs to have a better benchmark. I wonder how long these bulbs take to reach their operating temperature, 5 minutes should be enough?

    My bike is 3 years old with the OEM bulb and no issue so far, I'm about to install the HIDs....
  5. murpies

    murpies Been here awhile

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  6. murpies

    murpies Been here awhile

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    Fantastic write up bro. If only u have the cyclops LED to test it out. I guess it will defiantly drop below 53°C.
  7. ebrabaek

    ebrabaek Long timer

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    Reason the stock, and HID heats about the same, is because they both dissipates heat inside the bulb, and they both consume 55 watts. Simple as that.
    The 35 watt HID is less because of that.
  8. murpies

    murpies Been here awhile

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    Can anyone add in the info-
    So if we compare the 3 bulbs :
    Cyclops LED -Lumen 2400 ??°C
    OEM Halogen-Lumen ??? 56°C
    HID 55watt. -Lumen ??? 53°C
  9. ebrabaek

    ebrabaek Long timer

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    How much does a new OEM housing cost. ???
  10. Reaver

    Reaver Outta Here

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    Reaver's warehouse has a good deal on a US spec 0 mile unit. :evil
  11. ebrabaek

    ebrabaek Long timer

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    Ha..... I just wondered why so little replaces their burned unit. Must be pricy.
  12. Reaver

    Reaver Outta Here

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    Didn't know if you were serious.......

    Max BMW lists it at $450. Comes with bulbs too. :1drink
  13. ebrabaek

    ebrabaek Long timer

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    Not as pricy as I thought. How are ya gonna drag all your parts to CR.....:lol3
  14. murpies

    murpies Been here awhile

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    So if we compare the 3 bulbs :

    Cyclops LED -Lumen 2400 @ ??°C

    (If Halogen bulb produce 20 lumens per watt. So 55watt = 1100 Lumen )
    OEM Halogen-Lumen 1100 @ 56°C

    HID 55watts -Lumen 3500 @ 53°C

    HID 35watts -Lumen 2100 @ 33°C
  15. Azz

    Azz Adventurer

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    I just heard back from BMW Australia about my burned out headlights and they're going to give me a new headlight for both my bike and my wife's :-D
    Just saved me somewhere between $1000-1500AUD to replace them both for a clearly faulty product!
  16. murpies

    murpies Been here awhile

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    BMW :thumb Can share whether the replacement is a new model like the 2014 adv or the same old design. If it the same old design then it will happen again using the oem bulb.
  17. JRWooden

    JRWooden Long timer

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    Hmmmmmmmmm I had not realized the 2014 ADV was a different design ... I'll have to look at one more closely..........

    Thanks!
  18. Azz

    Azz Adventurer

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    motorcycled around Oz for honeymoon, now hooked!!
    I'm hoping to have them tomorrow, they had no stock in Melbourne so are shipping them down from Sydney. Will advise if they are the same old or a newer design...
  19. murpies

    murpies Been here awhile

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    Sure Azz. The different between both is the rear headlight cap.
    The new one 2014 adv F800gs look like this
    [​IMG]
  20. camponubla

    camponubla Adventurer

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    Murpies,

    What is the diference between the 2014 and 2013 rear cap? I can not see what diferences there are in the picture you have posted.

    Kind regards,