SV: [gecko]uvb penetration

[obeligz]

Hi. Last fall I was at a Dendrobates symposium in Denmark where there were several lectures on terrarium building and some demonstrations around the topic. Amongst the others there was a demonstration on lighting. En experiment was set up with a UV fluorescent and a UV-meter about 15 inches under the light source. Different types of glass were put between the light source and the UV-meter. An 5mm acrylic sheet filtered out about 95% letting about 5% pass. A 4mm standard glass filtered out about 20% letting about 80% pass though. A 6 mm standard glass filtered out somewhat more than the 4mm glass. The lecturer also demonstrated a special type of glass that was said to cost somewhat more than normal glass but it filtered out only a minuscule amount of UV light and let about 99% or so of the UV light pass through, the special type of glass was about 4mm thick. Regards obeligz msn: [EMAIL PROTECTED]      ���� )/_   �������                _.--..---"-,--c_     �������         \L..'           ._O__)_  ������    ,-.     _.+  _  \..--( /             �������    `\.-''__.-'\ (     \_    �����       `'''       `\__   /\     ������                 ')   -----Opprinnelig melding----- Fra: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] P� vegne av Garrett Peterson Sendt: 29. februar 2004 16:07 Til: gecko list Emne: [gecko]uvb penetration   can uv rays penetrate through glass and acrylic or do you need screen?   One Man Gathers What Another Man Spills. Do you Yahoo!? Get better spam protection with Yahoo! Mail