[Author Prev][Author Next][Thread Prev][Thread Next][Author Index][Thread Index]
RE: You're-a-peein' lights?
The main difference between euro and US headlamps is that on euro
headlamps all the light is directed right where you need it - onto the
road. On US headlamps, depending on car brand/model, usually some of the
light is wasted on illuminating peaks of the trees (and blinding
oncoming drivers as a side effect). The bulb wattage only tells you how
much power it draws, which doesn't have direct conversion to brightness
(only a fraction of this energy is converted into light, the rest is
wasted as heat) For example, Philips has recently introduced a new H4
bulb that is promised to be 20% or so more bright while still having the
same wattage (55/60W) as conventional ones. I don't have any
comparisions between H4 and US bulbs of the same wattage, though.
87 Audi 5000CS turbo (mine)
88 Renault Medallion wagon (mom's)
91 mountain bike (just in case both cars broke at the same time :-)
> -----Original Message-----
> From: email@example.com [SMTP:firstname.lastname@example.org]
> Sent: Tuesday, October 21, 1997 9:53 AM
> To: email@example.com
> Subject: You're-a-peein' lights?
> Well, I've read all the propaganda, and for the most part believe
> it, but was trying to explain to my Dad why I wanted to spend 20% of
> the purchase price of my car to get "brighter" lights, and he just
> asked me for numbers, ie: some objective data, and I couldn't give
> him any. Does anyone have this data? Has anyone used a light meter
> for example to actually measure how much brighter they are? Dad's
> giving me the 65w is 65w line, and why would DOT-spec be any worse
> than E-spec, they're both government specifications.
> Any ammo would be welcome.