Mark Jurras wrote:
>
> Sorry to burst everyone's bubble but it is not good Lucas bulb design
> but poor Lucas electrical design that keep you bulb burning. Bulbs are
> designed to have a certain life at a certain wattage. The wattage of
> the bulb is obtained by applying the correct voltage to the bulb.
>
> Let's look at an example I am familiar with. A certain 12V 100W quartz
> halogen projector bulb life is rated at 25 hours. Not to long. But if
> the voltage is reduced, the life goes up exponentially. Running this
> bulb at 8 volts the calculated life is >20,000 hours.
>
> Now with all the Lucas connectors and grounds that corrode the full 12V
> never gets to the head lights thus extending the life dramatically.
>
> - -Mark "My bulbs last longer than my connections" Jurras
Mark et al., From the depths of my rusty store of electrical formulae,
I seem to remember that watts divided by volts equals amps. Given that
is so, if the voltage drops for a given wattage of lamp, that SHOULD
mean that the amperage goes up. I don't know how much current that
headlight circuit is fused for, but a drop of 4 volts in a 12 volt
circuit means an increase of 50% in the amperage flowing through it.
Somewhere, something has got to give; let's hope it doesn't require a
fire extinguisher! :-)
Regards,
Glen Eldridge
glenel@infobahnos.com
'64 Midget Mk1(stage 3 1275) '95 Nissan Maxima
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