All devices requiring electric power will generate ELF and VLF radiation. Magnetic fields pass through most materials, including concrete, steel, and lead. The greatest reduction in H-field emission is achieved by wrapping the internal electrical components with a very expensive material called mu metal. All 3M GlareGuard filters are tested by an independent laboratory that specializes in compliance testing. Insignificant amounts of UV are emitted by a computer monitor and are related to the emission spectrum of the phosphor and pose no known health concern for office workers.
All glass provides excellent blockage of UV light.
UV light is the invisible region of the spectrum just beyond the violet end of the visible region of electromagnetic radiation. An electrical charge can build up uniformly over a non-conductive glass surface, such as a computer monitor. Conductive coatings with proper earth ground provide a path for discharging this electrical charge build-up. Almost all 3M GlareGuard Computer Filters feature a conductive coating and grounding cord with clip to provide the path and grounding mechanism for full discharge of the electrical charge buildup. 3M GlareGuard Computer Filters with the anti-static feature discharge an electrostatic buildup of 5000V in less than 0.1 seconds when properly grounded.