<snip>
>Pete,
>The 'life' rating is for the fluorescent UV light tube.
>The tube may 'light up' longer, but the UV-emitting phosphors
>eventually degrade, and usually don't emit enough germicidal=20
>UV-B and UV-C for more than 12 - 18 months of full-time use.
UV emitting phosphors?????
Correct me if I'm wrong, but afaik, the uv is generated by the
mercury vapour in the fluoro tube. Normal, *visible* light
fluoro's *require* phosphors to convert the uv to visible light.
A uv fluoro on the other hand requires no phosphors, but *does*
require a quartz glass tube as normal glass blocks the uv.
Cheers,
Alan