11 [ Lighting apparatus and installations, namely, electric lighting fixtures, landscape lighting installations and waterscape lighting installations; lighting apparatus, namely, ultraviolet lamps not for medical purposes, sterilizing lamps; water treatment apparatus, namely, ultraviolet sterilization units, water filtering apparatus, water-purifying apparatus, pond filters, aquarium filters, fountain filters and parts therefor, filter devices and lighting devices therefor, namely, light bulbs and water filters; fittings for sanitary installations, namely, couplers, valves, vacuum release safety valves for flow shutoff, tub overflows for swimming pools and fountains ]