air purifier; air sterilizer; air purification apparatus; air purifying apparatus creating germicidal partition between rooms, spaces, or air masses; germicidal apparatus for the treatment of air; air filtering unit; air disinfectant apparatus; ion generator; negative air ion apparatus, with or without forced air; internet-of-things- (IoT) or smart-home-enabled apparatus for purification, cleaning, filtering, disinfection, or treatment of air; apparatus for disinfection or decontamination of surfaces; germicidal partition comprising a curtain or stream of high-concentration negative air ions; flexible and semi-flexible lighting panels; flexible and semi-flexible lighting panels with inter-panel network connectivity and built-in or modular wireless network access points