[quote author=Fairbanks link=topic=65810.msg1134657#msg1134657 date=1168021802]
I'm not an electrical expert, but I do know that Watts = Volts x Amps. Given a constant voltage (assume 12v for arguments sake), then a given light bulb could draw more amperage and therefore generate more wattage (up to the amperage draw and heat limits of your electrical system). Now, I'm not sure how many amps the stock Mazda3 headlight circuit can handle, but I don't see why a bulb could pull slightly more current and generate more wattage.
To put it another way, if you take a 40w bulb out of a socket in your house and replace it with a 75w bulb, you get more light. The bulb didn't generate electricity, but it is pulling more amps which is in turn burning through electricity at a faster rate. So . . .
W = V x A or W / V = A
55W / 12V = 4.5A
110W / 12V = 7A (not insignificant, but certainly reasonable)
Anyhoo, I'll crawl back in my hole and continue lurking now.
-Rob
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Hey all are welcome here so close shop in that hole and keep posting.