Patent ID: 8721131

Claim:
A lighting unit comprising: a slender substrate; a plurality of semiconductor light sources arranged in a row in a lengthwise direction on the substrate; and a light reflector disposed along one long side of the substrate and extending over the semiconductor light sources, the light reflector having a multi-reflector in which a plurality of small pieces is combined in an up and down direction, each of the small pieces having a light reflecting face that is spherical or aspherical to converge light from the semiconductor light sources, the small pieces being arranged so that a surface area of the small piece is larger and a focal distance of the small piece is longer as a distance between the small piece and the semiconductor light sources is larger, with a focal point of the small pieces being located at a position corresponding to the semiconductor light sources, layout angles of the plurality of small pieces being arranged so that the light from the semiconductor light sources is taken out as reflected light beams having different optical axes that are not parallel to each other to illuminate an entire area of a prescribed range in the up and down direction, wherein each of the semiconductor light sources includes a semiconductor element chip covered with a covering member including a fluorescent material.