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Re: More about UV

>Finally, ordinary glass absorbs a huge amount of uv up to 80%.

That's why I don't use cover glass under my Hagen ReptiGlo 5.0.

>but............I thought that plants absorbes red and blue light for
>photosynthesis anyway........so what would be the point?

No but some plants use anthocyanin (red pigment) as sunscreen 
against UV-B.
UV-B = Redder plants.

// Daniel.