Hella H4 low beam as high beam?

[pilotlars at yahoo.com (Lars Bruchmann)]

hi, i'm not entirely sure what you are asking... an h4
light can be used as a high beam only, just don't use
the low beam filament.  using the high beam as a low
beam presents the same problem as sae/dot spec lights
have: the beam scatters upwards too much and blinds
oncoming traffic.  the dome cathy refers to keeps the
light from the bulb itself from coming straight out of
the lamp, which would blind traffic.  you'll notice
that high-beam lamps don't have those, and even the
9006/9005 combinations in america, the high beam bulb
has no dark covering on the end of it, the way the low
beam bulb does.  you'll note that h1/h2/h3 bulbs don't
have a cover either, but h7/h4s do.  the bulb position
is critical, in fact.  the bulb is at the focal point
of the parabolic reflector.  if it is too far forward
or rearward, the light will focus too close or too far
away, resulting in a less intense beam that either
does nothing or blinds traffic, without putting light
on the road where it is needed.  left/right movement
does the same thing.  again: i didn't fully understand
the question, so please feel free to clarify for me,
thanks!!  lars

--- C Boyko <roccit_53@scirocco.cs.uoguelph.ca> wrote:

> On 7:33:46 am 07/14/05 "Rick Kellner"
> <rfkellner@snet.net> wrote:
> > I have acquired two sets of Hella low beam kits. 
> The kits contain the
> > US style rectangular glass lenses, boot, wire
> harness.  Since the
> > lights are both high and low beam can one set be
> used as the high
> > beams?  I realize that the wiring will be
> different; basically the
> > low beam conductor will not be used.  Next a high
> beam bulb will be
> > used in place of the dual low/high beam bulb.
> > So do you think it will work (i.e. project the
> light) properly?
> 
> I'd say yes, but I'll go out and take a look at mine
> (which reminds me,
> they need aiming) Anyway, on my MkI I have hella H4
> outers and the sealed
> equivalent as inners, I have the inner lows on a
> switch so I can do four
> lows when it won't piss anyone off. They are bright.
> 
> Now on the MkIIs quad rectangles, the lens on the H1
> is different, the logo
> that says "H1" (and the centre of the lens) is a bit
> higher up, and there's
> no inner dome ( which must be a mirror??) in the H1.
> Which probably means
> you'd have trouble using the H1 as a low beam. Now I
> wonder how important
> the filament position is in the bulb itself?
> 
> Cathy
> > _______________________________________________
> > Scirocco-l mailing list
> > Scirocco-l@scirocco.org
> > http://neubayern.net/mailman/listinfo/scirocco-l
> >
> 
> 
> _______________________________________________
> Scirocco-l mailing list
> Scirocco-l@scirocco.org
> http://neubayern.net/mailman/listinfo/scirocco-l
> 



		
____________________________________________________
Start your day with Yahoo! - make it your home page 
http://www.yahoo.com/r/hs