US Patent 10928020 Light bar for suspended ceiling

An elongated lighting assembly useful in suspended baffle ceilings comprising an inverted channel having an upper web and opposed legs depending from opposite sides of the web, inturned flanges extending inwardly from lower ends of the legs, distal edges of the flanges being horizontally spaced from each other to form a gap, LED tape located over an upper surface of the flanges and carrying upwardly facing LED elements at regularly spaced intervals, surfaces inside the channel facing the LED tape being coated with a white diffuse reflecting material whereby light emitted by the LED elements emanates essentially exclusively out of the gap by diffuse reflection from the coating.