Date: Tue, 5 Sep 2006 00:40:38 +0000 (UTC) From: Craig's Saab C900 Site <c900nospam.apana.org.au> Subject: Re: Daytime running lights...what's the deal?
Gary Fritz <fritzxxxnospamrii.com> writes: >"Jon R. Pickens" <jonrpicknospaml.com> wrote: >> Hi... My 2000 9-3 convertible has DRL and "headlights ON" options on >> the switch. What's the difference? >> >> I just figured out today that the high-beam switch does nothing while >> the light switch is set to DRL, and the fog light switch works the >> same. >See http://en.wikipedia.org/wiki/Daytime_running_lamp. >DRL is the intended position during the day. The high-beam switch does >nothing in this position because they don't want cars to use high-intensity >lights during the day. >"Headlights ON" is the normal night-time position, and allows you to use >the high beams. >You have to wonder why high-intensity lights are a safety problem during >the day (when the ambient light is orders of magnitude higher than at >night, your pupils are contracted, etc.) but they "aren't" at night (when >the headlights are vastly brighter than any other light source around). >But we're talking laws here, not logic. I think a lot of this has to do with the stupidity of 'reverse logic' in lighting design which sees modern car front lights have everything integrated into one unit, and the headlights are often two seperate lamps which means not only is there more to fail, but when something fails you often have to replace the entire cluster and they're very expensive. Then again I'm sure that when new, classic 900 headlights (since they are unique and not used on any other make/model of car) priced out at a bit dollar figure. Especially the H4 e-code lights which were used all through Europe and here in Oz, but not in the US/Canada until the 'facelist' 900's appeared. Craig. -- Craig's Saab C900 Page at | Craig's Classic Saab Workshop - Sydney .au http://lios.apana.org.au/~c900 | http://www.classicsaab.net and other URL's Email: c900nospam.apana.org.au | For Saab 99/C900/9000 Enthusiasts World-Wide! Alternate: saabonautnospaml.com | Web-forums, galleries, library, links, etc.
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