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In a lighting unit, fluorescent lights and LEDs having different spectroscopic characteristics are alternately arranged in a direction X on an irradiation plane. The fluorescent lights are arranged in certain intervals so as to provide uniform light intensity even around the end portions of the dire

In a lighting unit, fluorescent lights and LEDs having different spectroscopic characteristics are alternately arranged in a direction X on an irradiation plane. The fluorescent lights are arranged in certain intervals so as to provide uniform light intensity even around the end portions of the direction X. The LEDs installed at the ends of the direction X have a light intensity that is weaker than that of other LEDs in order to provide uniform light intensity around the end portions. As a result, the lighting unit provides uniform light intensity across the entire irradiation surface.

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The invention claimed is: 1. A lighting unit comprising:first light sources and second light sources, having different spectroscopic characteristics and being alternately arranged to be spaced apart at uniform intervals in a first array direction on an irradiation plane; whereinat least either the f

The invention claimed is: 1. A lighting unit comprising:first light sources and second light sources, having different spectroscopic characteristics and being alternately arranged to be spaced apart at uniform intervals in a first array direction on an irradiation plane; whereinat least either the first light source or the second light source that is located at an endmost position at at least one end in the first array direction comprises an auxiliary light source arranged to make uniform a light intensity at the at least one end with a light intensity of all other portions of the lighting unit by compensating for insufficient light intensity at the at least one end, the auxiliary light source providing a light intensity which is weaker than a light intensity provided by the other light sources of the lighting unit that have identical spectroscopic characteristics as that of the auxiliary light source.