The present invention is a lighting device for raising a plant, including a red LED having an emission wavelength between 600 and 680 nm and a far red LED or an infrared LED having an emission wavelength between 700 and 900 nm, characterized in that the red light emitted by the red LED and the far red light emitted by the far red LED or the infrared light emitted by the infrared LED can be alternately irradiated in a pulse state. As a result, the lighting device for raising a plant and a plant raising method which promote photosynthesis of a plant and grow the plant well are provided.本發明係一種植物育成用照明裝置，包含紅光LED，發光波長為在600~680nm間；以及遠紅光LED或紅外光LED，發光波長為在700~900nm間。該紅光LED所發出紅光與遠紅光LED或紅外光LED所發出遠紅光及紅外光係為能以脈衝狀交互地照射。藉此提供一種促進植物光合作用，植物生長良好的植物育成用照明裝置及植物育成方法。
