Re: Not so much electronics, more electrics



Sam Goldwasser wrote:
While the scenario of the bits of the filament shorting is possible with
some lamps (usually with long thin filaments, though unlikely with the
short filaments of halogen lamps), the more likely cause is the arc
resulting when the filament opens. This results in the arc moving
towards the filament supports, with a lower resistance than the filament
had originally, leading to a high current.

What I never figured out is how the arc is maintained for more than 1/120
of a second when there's no air around the arc to ionize.

--
Angry American flags attack Hillary Clinton!
.



Relevant Pages

  • Re: Biax lamp query
    ... the voltage at the pins remained at 120v. ... electrodes hot enough for starting. ... my limited experience when I had a voltmeter across a filament). ... With DC, an arc that forms ...
    (sci.engr.lighting)
  • Re: new lightbulbs
    ... Testing was in an integrating sphere with an Ocean Optics spectrometer. ... agree that filament (or arc) location accuracy is absolutely critical ... handle it, the lights get no brighter but the wiring melts, or the ...
    (uk.rec.cars.modifications)
  • Re: new lightbulbs
    ... Testing was in an integrating sphere with an Ocean Optics spectrometer. ... Anothe problem with HID retrofits is that the actual luminous portion of the arc itself is substantially larger than that of a filament lamp, causing poor focussing and softening of the beam. ...
    (uk.rec.cars.modifications)
  • Re: Not so much electronics, more electrics
    ... some lamps (usually with long thin filaments, ... short filaments of halogen lamps), the more likely cause is the arc ... resulting when the filament opens. ... This results in the arc moving ...
    (sci.electronics.repair)
  • Re: New Audi tail lamps
    ... > many european HID headlights very glary. ... Actually the arc size is comparable in size to a filament in a ... The arc is around 4 mm long, ... A reasonable headlamp beam pattern will put at least 300 lumens on the ...
    (sci.engr.lighting)

Loading