Air cleaning units; Air cleaning units containing an air filter, ultraviolet lights and a photocatalytic filter; Air purification apparatus; Air purification units; Air purifiers; Air purifiers for household purposes; Air purifiers, electric; Air purifying apparatus; Air purifying apparatus and machines; Air purifying machines; Air purifying units for commercial use; Air purifying units for industrial purposes; Air sterilizers; Air sterilizers for household use; Air sterilizing apparatus; Apparatus and instruments for use in the purification, separation and sterilization of liquids and gases used in the biotechnology, pharmaceutical, medical, biopharmaceutical and food and beverage industries; Apparatus and instruments for use in the sterilization of liquids and gases used in the pharmaceutical industry; Electric air purifiers; Filters for air purifiers; Germicidal lamps for purifying air; Halogen lamps; Halogen light bulbs; Industrial-water purifying apparatus; Industrial air purifiers; LED (light emitting diode) lighting fixtures; LED light bulbs; Light bulbs; Lighting fixtures; Ozone generators for air purification; Robotic air purifiers for household purposes; Sterilization units for buildings in the nature of apparatus that floods a room or space with anti-bacterial gas that eliminates all bacteria in the room or space; Ultra-violet radiators not for motors and engines; Ultraviolet lamps not for medical purposes; Ultraviolet ray lamps, not for medical purposes; Ultraviolet sterilizers for water treatment; UV toilet sterilizers for household purposes; Water sterilizers; Water treatment equipment, namely, ultraviolet sterilization units; Wearable air purifiers; Sterilization units for medical purposes; UV halogen metal vapour lamps