UVB through glass?

[Rom]

If you want the frog to have UVB, you’ll need to replace the glass with screen. Glass DOES filter out UVB.

But apparently they used a UVB measuring device and they picked up UVB through the glass tops if the vivs at pet shop. It was how they determined when to change the bulbs?

I don't think she would lie about that? Does anyone here use something like that to detect when bulbs need changing? Would be interested to see if anyone has tested that