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From: dunphy@col.hp.com (Dan Dunphy)
Newsgroups: sci.electronics
Subject: Re: Halogen news (Re: Do Halogen lamps need ballasts?)
Message-ID: <16120021@col.hp.com>
Date: 5 Jan 91 00:32:08 GMT
References: <FISH.90Nov28100429@his.gemed.com>
Organization: HP Colorado Springs Division
Lines: 6

I used a halogen (H4) with a modulator in my motorcycle for a long
time. The decrease in tempeature caused a significant
tungsten deposit to form on the inside of the quartz
envelope. There was a significant hole in the low beam pool of
light in front of the bike. I believe a dimmer defeats the
halogen cycle.