Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uwm.edu!mrsvr.UUCP!fish From: fish@gemed.com (Mark Fisher) Newsgroups: sci.electronics Subject: Re: Do Halogen lamps need ballasts? Message-ID: Date: 28 Nov 90 16:04:29 GMT Sender: news@mrsvr.UUCP Reply-To: fish@gemed.ge.com (Mark Fisher, GE Medical, Milwaukee WI, x4-6553) Distribution: sci.electronics Organization: GE Medical Systems, Milwaukee, WI Lines: 18 I think I can answer my own question. I went to the hardware store and looked at some quartz-halogen replacement bulbs. They have what appears to be a tungsten filament wire inside a quartz tube. Going off the deep end, I would say that the resistance of the wire would limit the current and no ballast is needed. I would also assume that the dimmer circuit in halogen lamps is a regular high wattage dimmer. I noticed on the demo lamp that dimming the light made the quartz-halogen tube humm loud enough that I could hear it in a noisy wharehouse type of store. I looked up halogen in my dictionary. It said it was one of the very active chemical elements, fluorine, chlorine, bromine, astatine, or iodine. How does this apply to a light bulb? -- // Mark M. Fisher // fish@gemed.ge.com // uunet!crdgw1!gemed!fish // sun!sunbrew!gemed!fish