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- From: habersch@husc9.harvard.edu (Oren Haber-Schaim)
- Newsgroups: sci.physics
- Subject: Re: safety of halogen lamps
- Message-ID: <habersch.722554626@husc9>
- Date: 23 Nov 92 21:37:06 GMT
- Article-I.D.: husc9.habersch.722554626
- References: <siegemun.722213945@phyast.nhn.uoknor.edu>
- Lines: 31
- Nntp-Posting-Host: husc9.harvard.edu
-
- siegemun@phyast.nhn.uoknor.edu (Stephan Siegemund-Broka) writes:
-
- >I saw an article in the NYTimes a while ago that said that
- >halogen lamps produce a lot of radiation in the UV-b region.
- >This is supposedly a harmful part of the spectrum. The authors
- >were irate over the fact that manufactures of the these lamps
- >do not in general supply some sort of a cover to filter these rays out.
- >Any comments???
- >Thanks
- >Stephan Siegemund-Broka
- >Department of Physics and Astronomy
- >University of Oklahoma
-
- Unless they compared the relative UV output of tungsten-halogen
- lamps (I assuming you meant tungsten-halogen) with
- ordinary fluorescent bulbs, I wouldn't be impressed by the
- article.
-
- In any case, the temperature of tungsten filaments is less than
- 2/3 of the sun's effective 6000 K radiation temperature, so
- there is far less relative UV output than sunlight's, not
- to mention an order or 2 of magnitude less overall intensity
- than in an office environment.
-
- ALso, t-h bulbs with screw-in bases for general household use
- have relatively modest filament temperatures to get long life,
- compared to those used for slide projection etc. which have
- a life of tens of hours, vs. thousands of hours for the former.
-
-
- Oren Haber-Schaim
-