Russel... Close, but no cigar!!! You're mostly right, though. It is iron that affects the passing of UV rays, but it's actually glass with more iron that passes it rather than the other way around. Special lights that generate UV spectrum light are basically the same as their commercial counterparts, but the outer shell is made with high-FE glass. FWIW, I've been told (never tried it) that if you're building especially for something that requires UV light you can special order high-FE glass for very little more than normal glass.
Russel Traher wrote: > > It depend on the 'type' of glass. Most glass used commercially for the > production of windows/aquariums will filter most (and in most cases all) > UVB. I've been told it's the iron in the glass that does not let UVB to > pass through. Generally most aquarium glass lids are made from the same > 'cheaper' glass (which contains iron) and won't allow any UVB through. > > Hope that helps > Russel > > ----- Original Message ----- > From: "Robert Gundy" <[EMAIL PROTECTED]> > To: <[EMAIL PROTECTED]> > Sent: Monday, 21 January 2002 10:28 > Subject: [Gecko] UVB rays and glass > > > Will essential UV rays needed for animals filter > > through glass? Two examples: If a fluorescent UVB bulb > > is put on top of an all glass tank, will the glass top > > filter out the essential UVB rays? What about sunlight > > through a window? > > > > Any help on this would be greatly appreciated. > > > > http://www.geocities.com/reptiluvr > > > > __________________________________________________ > > Do You Yahoo!? > > Send FREE video emails in Yahoo! Mail! > > http://promo.yahoo.com/videomail/ > > > > > ########################################################################### > > THE GLOBAL GECKO ASSOCIATION LISTSERV > > WebSite: www.gekkota.com Archive: > [EMAIL PROTECTED]/ > > The GGA takes no responsibility for the contents of these postings. > > > ########################################################################### > > > > -- Doug Johnston
