PROBLEM TO BE SOLVED: To achieve desired light intensity of far-infrared light and increase flexibility in setting red light, in plant cultivation utilizing illumination light including far-infrared light.SOLUTION: A plant cultivation system (10) includes an LED element and a fluorescence substance emitting light by receiving excitation light emitted from the LED element. Further, the plant cultivation system comprises a magenta LED (20a) emitting mixed color light having a wavelength of 700 nm to 800 nm, and a red light source (20b) emitting red light.【課題】遠赤色光を含む照明光を利用した植物栽培において、遠赤色光の所望の光強度を実現し、赤色光の設定自由度を高める。【解決手段】植物栽培システム（１０）は、ＬＥＤ素子と、当該ＬＥＤ素子から出射された励起光を受けて発光する蛍光体とを含み、７００ｎｍ以上８００ｎｍ以下の波長を有する遠赤色光を含む混色光を出射するマゼンタＬＥＤ（２０ａ）と、赤色光を出射する赤色光源（２０ｂ）とを備える。【選択図】図１
