Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!pacific.mps.ohio-state.edu!linac!att!cbnewse!leland
From: leland@cbnewse.att.com (leland.m.kornhaus)
Newsgroups: sci.electronics
Subject: Re: Halogen news (Re: Do Halogen lamps need ballasts?)
Summary: New question
Message-ID: <1991Jan8.220413.8949@cbnewse.att.com>
Date: 8 Jan 91 22:04:13 GMT
Distribution: na
Organization: AT&T Bell Laboratories
Lines: 5

I hate to start a new thread about lights, but here it goes...  Today I saw
a room that had florescent lighting ith dimmer switches controlling the 
florescent bulbs.  How is this done?  Would it be done before the ballasts?
Does it work by Pulse Width Modulation?  There was absolutely NO flicker that
I could see.  Any answers?  Enquiring minds want to know.