Plexiglass filters out most UV rays smaller than 300nm (some Plexiglass is treated to filter all the way to 400nm), UVB rays range from 280nm to 315nm. Can UVC pass through plastic? This Stanford University source reveals that short wave UV (UVC) cannot pass through most plastics or ordinary glass.

In general, acrylic sheet scratches easily and retains a static charge, which can be problematic when framing pastels or charcoals. Some manufacturers, add dyes to acrylic glass to filter the UV light transmittance, and its surface can also be treated with both anti-static and anti-reflective coatings. Glass Surface Treatments and Coatings
The UV light does not have a shut-off facility. Since the UV light is invisible, you cannot determine whether the unit is functioning. However, UV water purifiers have LED indicators to notify users. UV water purification requires pre-filtering to remove other contaminants. UV Water Purification – Frequently Asked Questions
A UV light kit will often include a flow control device (or one is purchased at a local plumbing supplier) that is installed at the inlet side of the fixture - a small disc that is inserted into the plumbing connection on the light fixture. The UV light water treatment system must be properly installed - at the right location in the water system.

UV air purifiers are devices that use UV light technology to capture air and pass it through a filter. The air then goes through a small internal chamber where it becomes exposed to UV-C light.

HVAC UV lights are relatively affordable, especially compared to air filtration systems like air purifiers and filters. The initial cost of installing HVAC UV lights is between $200 and $600 for coil sanitizing lights and between $250 and $700 for air sanitizing lights. These estimates include equipment and installation, although labor rates 2e6kr. 830 800 575 285 36 594 87 117

does plexiglass filter uv light