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From: hrs@houxb.UUCP (H.SILBIGER)
Newsgroups: net.auto
Subject: Re: Re: Re: Color of the lights
Message-ID: <386@houxb.UUCP>
Date: Tue, 6-Nov-84 17:02:04 EST
Article-I.D.: houxb.386
Posted: Tue Nov  6 17:02:04 1984
Date-Received: Thu, 8-Nov-84 00:32:20 EST
References: <372@houxb.UUCP> <55200111@trsvax.UUCP> <9611@watmath.UUCP> <600@bunker.UUCP> mgweed.13249
Lines: 23



Of course fog lights should be wired such that they can be used
with parking lights and not with low beam headlights! They should
not be used without parking and tail lights on, however.

Item 2: Low pressure sodium vapor street lights are used because
they are more efficient than any other lights source in 
lumens/watt.

In order of efficiency, from high to low:

Low pressure sodium vapor
High pressure sodium vapor (bright pink)
High pressure mercury vapor (blue)
High pressure sodium vapor with color correction (blue-white)
Fluorescent
Quartz-halogen incandescent
Incandescent

Conversion efficiency ranges from > 50% to 17%!

Herman Silbiger