I would caution you not to confuse UV with visible light. You can't measure UV 
output with a standard light meter and, as I'm not a physicist, I don't know if 
reducing the amount of visible light (footcandles) will also diminish UV. I 
suspect it won't make any difference, given the wavelenghts of UV rays vs. 
visible light rays. You don't mention how you know that the UV filters don't 
reduce output enough. The tubes sold by Light Impressions claim to reduce UV 
by 92%. That seems pretty good to me. Perhaps the only way to reduce it 
completely is to switch away from light bulbs that emit UV. Then your only 
worry is light level in the visible spectrum. 

Check with the standard sources (University Products, Gaylord, Light 
Impressions, etc.) for flourescent tubes with built in UV protection. I can't say 
I've ever seen any. 

(Hey Dave, any ideas?)


Diane Gutenkauf
[log in to unmask]
Director
Robert R. McCormick Museum
Wheaton, IL 


On Fri, 13 Oct 2006 12:27:26 -0400, Jamie Smith 
<[log in to unmask]> wrote:

>Hi all,
>We are trying to find better light bulbs for our exhibit cases. Has anyone
>come across light bulbs that put out less UV than using florescent bulbs
>with UV filters?
>We are trying to find something that might fit our existing light fixtures
>which are four feet and use T-12 bulbs. Any leads on vendors that might 
have
>something that would work for us would be appreciated.
>
>Many Thanks,
>Jamie Smith
>FASNY Museum of Firefighting
>=========================

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