Xref: utzoo sci.electronics:15754 misc.consumers:24568 Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!world!jon_sree From: jon_sree@world.std.com (Jon Sreekanth) Newsgroups: sci.electronics,misc.consumers Subject: Re: Halogen Lamps, too (was Re: florescent bulbs replacing incandescent) Message-ID: Date: 20 Nov 90 16:39:48 GMT References: <1990Nov16.091211@mathcs.emory.edu> <1990Nov17.211808.21546@ameristar> <27836@mimsy.umd.edu> Sender: jon_sree@world.std.com (Jon Sreekanth) Organization: The World Lines: 39 In-Reply-To: terry@brillig.cs.umd.edu's message of 20 Nov 90 01:17:32 GMT In article <27836@mimsy.umd.edu> terry@brillig.cs.umd.edu (Terry Gaasterland) writes: Has anyone seen these new fangled indoor halogen lamps? They've been described to me: about 6 feet tall, point straight up (looking into one of them can ruin your eyes), take bulbs of up to 500 watts, light up a whole room well enough to read, with an analog dimmer to adjust the amount of wattage used, use less energy to light a room than a regular incandescent bulb. I've been told that they are available by catalog and that some discount houses sell them for about $40.00. Local department stores (Boston area) sell them for ~ $100. Damark, among others, lists them in their catalog for $39.99 (extra bulb set for $12.99), shipping is $9.50. I bought two from them, and I've been using them since mid-July, and I'm quite satisfied with them. At full power, 500 watts in a small room is quite overwhelming. It's almost a room heater at that level. The dimmer is slightly noisy (AC hum). Damark is 1-800-729-9000. The lamp is Item No. B-364-140905, for black. They also have white, brass, chrome and almond. UL Listed. Incidentally, the thing is really noisy, electrically. An oscilloscope about 6 feet away from the lamp, when the lead is touched, shows the normal background AC 60Hz noise. When the lamp is turned on, about one-fifth brightness, there is a glitch at every zero crossing. Quite noticeable, easily 10% - 20% or more of the sine wave peak. Are they allowed to put out so much junk ? I turn the lamp off and use a regular (=non dimmer) lamp when I'm taking any low voltage readings. I don't know if the noise is being radiated, or put onto the AC line, or both. Regards, / Jon Sreekanth Assabet Valley Microsystems Fax and PC products 346 Lincoln St #722, Marlboro, MA 01752 508-562-0722 jon_sree@world.std.com