New RxAir400 Pro UV-C bulb replacement cartridge provides 18,000 vs 9,000 hr. use. Worcester, MA, July 30, 2025 (GLOBE NEWSWIRE) -- With heightened concern about protection from harmful airborne viruses, Vystar Corporation's (OTCQB: VYST) RxAir400 Germicidal Ultraviolet (UV-C) light air purification systems offers new features and options that will make it easier to treat airborne pathogens wherever you go indoors. RxAir400 is a smaller, consumer/small business-sized version of the industrial size Rx3000 FD ...