Thread: HiTan VHR 160W vs. VHRTT 160W..
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Old 01-09-2007, 09:44 AM   #10 (permalink)
Silas Stingy
 
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Re: HiTan VHR 160W vs. VHRTT 160W..
simple math. divide the uvb into the total uv and you have your %.
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