Headlight bulb life.

[Ed Birch]

Subject: Re: Headlight bulb life

> > I have had Flosser from Germany, H4 bulbs in several cars for over 4
> >years; no failures yet.  Normal 9004 bulbs would last about 3 to
> >5  years.
>
> Same here.  I had some made in Korea H4 80/100W for about 4 years without
a
> failure.  I still have H4 Osram or so 70/75W in use for more than 7 years.
> Not heavy use, though.  In 4.5 years I've replaced 3 X H1 in constant use
> (day time running lights) for over 170k km on a NBeetle.

My experience with H-4 bulbs is with BMW motorcycles. Talk about road
vibration!
I've had good luck with German Phillips/Osram 55/100W and 80/100W H-4 bulbs.
I have two in use for well over 7 years, in constant use while riding the
bikes.
All lighting is routed thru a relay wired directly to the battery. A 12Ga
ground wire is used.

BTW, the Hungarian Hella 80/100W had a short life span.

Ed Birch, Pennsylvania
93-100S....with shitty NON H-4 lighting!