Not super scientific but the bottom has a section about UV light passing through objects. Screen works just fine with UV light, but glass/acrylic does not let UVB pass.
UV Lighting for Reptiles: UVB in Nature - Solar Ultraviolet Light

Here's a quote on Plants/UVB from the article under tips and tricks you posted Heather.
"Vivarium plants do not need UVB. The only time UVB lighting is necessary in a vivarium is if you are housing an animal that would benefit from it."