Hella H4 low beam as high beam?

[rfkellner at snet.net (Rick Kellner)]

Lars, thanks for the response.  Allow me to clarify.  I basically have
two identical sets of Hella* H4 rectangular lights for an MKII.  I want
to use one set in their proper position (outer two lamps).  No issues or
confusion with those.
Next, I want to know if the other set can be used as the inner set of
high beams.  I am thinking that this can be accomplished two ways.
1). I could use a dual High/Low H4 bulb in the lamp and only wire the
high beam element.
2). I could just use a high beam H4 bulb and wire it as such.

Electrically speaking either method will work however is one better from
a light projection point?
Thanks, I hope this explains it a little better.
Rick.

*Hella H4 Rectangular High/Low bean Part # 72146; contents: lamp, 60/55W
bulb and dust cover. 

-----Original Message-----
From: Lars Bruchmann [mailto:pilotlars@yahoo.com] 
Sent: Thursday, July 14, 2005 11:39 AM
To: roccit_53@scirocco.cs.uoguelph.ca; Rick Kellner
Cc: scirocco-l@scirocco.org
Subject: Re: Hella H4 low beam as high beam?

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
> >
> 
> 
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> 



		
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