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From: schuster@cup.portal.com (Michael Alan Schuster)
Newsgroups: sci.electronics
Subject: Re: Do Halogen lamps need ballasts?
Message-ID: <36350@cup.portal.com>
Date: 29 Nov 90 23:41:31 GMT
References: <FISH.90Nov28100429@his.gemed.com> <714@skipper.dfrf.nasa.gov>
  <1147@inews.intel.com>
Organization: The Portal System (TM)
Lines: 12

>The halogen cycle not only prevents rapid loss of filament
>material, it repairs minor flaws in the filament and prevents
>hot-spots due to these flaws.
>
>Halogen lamps burn out (barring some extensive flaw) only
>when one of the non-tungsten parts fails (the filament supports
>weaken from temperature cycling, the way the filament would
>if it weren't for the halogen cycle).


What's the principle behind the "krypton" flashlight bulbs being sold
now, and market as "70% brighter" than the standard type?


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