Newsgroups: rec.arts.theatre.stagecraft
Subject: Re: black lights
References: <[email protected]>
	<[email protected]>
From: Tomi Holger Engdahl 
Date: 15 Jun 1999 00:59:17 +0300
Message-ID: 
Organization: Helsinki University of Technology, Finland
Lines: 29
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[email protected] (Dingmanc) writes:

> You do no need special bulbs. You can buy UV Gels. 

You will need special bulbs designed to genereate UV.
These UB bulbs will definately outperform any
construction which uses normal light bubs and UV gels.

You can make some kind of lousy UV effect with UV
gels, but if want really good an bright UV effect you have
to go to UV fluorescent tubes or special fixtured
made to generate UV light (special gas discharge lamps).

A normal lamp fitted with UV gel will give out a little but
of real UV and more of that violet. A real UV bulb will
give many times more of that real UV and much less of that
visible violet, which makes the UV effect work much better.

All the UV effect which have been made with UV gels
I have seem have been much worse than what I ve seen with
real UV bulbs. If you want to do do good effectm then you
will definately need real UV bulbs. If you need
to be very cheap nad eefect does not have to be good, then
you might get around using some UV gels.


-- 
Tomi Engdahl (http://www.iki.fi/then/)
Take a look at my electronics web pages at http://www.hut.fi/Misc/Electronics/