lighting fixtures; lighting installations; lighting apparatus for sports arenas, aquatic arenas, natatoriums, gymnasiums, tennis courts, warehouses, manufacturing facilities, parking garages, parking lots, walkways, stairwells, laboratories, greenhouses, horticultural applications, food production laboratories; lighting fixtures for sports arenas, aquatic arenas, natatoriums, gymnasiums, tennis courts, warehouses, manufacturing facilities, parking garages, parking lots, walkways, stairwells, laboratories, greenhouses, horticultural applications, food production laboratories; ceiling lights; electric lighting fixtures; architectural lighting fixtures