Air humidifying apparatus; Air purifying apparatus and machines; Air sterilisers; Aquarium heaters; Aquarium lights; Bicycle lights; Cooling installations for water; Disinfectant apparatus for medical purposes; Diving lights; Electric lights for Christmas trees; Gas scrubbing apparatus; Germicidal lamps for purifying air; Humidifiers; Lamps; Lanterns for lighting; Laundry dryers, electric; Purification installations for sewage; Water filtering apparatus; Water purifying apparatus and machines...