<p><P>PROBLEM TO BE SOLVED: To provide a lighting device which enables an efficient growth of plants. <P>SOLUTION: The lighting device, which supplies lights necessary for growing plants, includes: a first fluorescent part, having semiconductor light-emitting elements each having an emission region in a near-ultraviolet region or an ultraviolet region and a red fluorescent material excited by light emission from the semiconductor light-emitting elements to fluoresce red light, and radiating at least the red light from the red fluorescent material to the outer part; a second fluorescent part having semiconductor light-emitting elements each having an emission region in a near-ultraviolet region or an ultraviolet region, and a blue fluorescent material excited by light emission from the semiconductor light-emitting elements to fluoresce blue light, and radiating at least the blue light from the blue fluorescent material to the outer part; and an electric power supply part for supplying electr
