Lighting system

Claim 1

Elongate lighting unit for use in a modular lighting system for generating light band type structures, said lighting unit comprising: an elongate carrier section having a cross-section resembling a double convex lens and being composed of two identically constructed, extruded, lateral profiled sections each having an essentially V-shaped cross-section with an apex and ends, defining a mouth, oposite to said apex; means connecting said lateral profiled sections together at said ends with said apices forming respective longitudinal side edges of said lighting unit and with said mouths confronting each other but spaced apart from each other, whereby to form a central chamber between said lateral profiled sections and side chambers within said lateral profiled sections; at least one fluorescent tube received within said central chamber; functional means comprising a choke and electrical cables and optionally other functional elements disposed in at least one of said side chambers; said lateral profiled sections including continuous webs, and undercuts forming coupling connections with modular elements to be mounted in said central region above and below said at least one fluorescent tube, said modular elements comprising translucent covers, non-light permeable covers, shield arrays and scattering grids; and reflectors provided to the sides of said at least one fluorescent tube with said reflectors extending across the mouths of the respective associated lateral profiled sections.