As you may remember, old white equipment would turn yellow over time. This is due to UV exposure from natural light. Now, any good company tests their equipment for UV exposure. I myself have seen such UV exposure tests in many factories.
UVC light has been used in hospitals and surgical rooms for decades. Hospitals also have delicate and expensive equipment. That being said, UVCs can damage these equipments if exposure time is too long. Avoid using UVC lamps overnight.