FAR-RED LIGHTING DEVICE FOR GROWING PLANTS AND CULTIVATION METHOD OF PLANTS USING THE SAME

PROBLEM TO BE SOLVED: To provide a far-red lighting device for growing plants which can evenly grow plants by reducing radiation illuminance just below a lighting and to provide a cultivation method of plants using the far-red lighting device for growing plants to solve a problem that when using a straight tube type lighting device in which an LED light source is used as a far-red lighting device for growing plants, the radiation illuminance just below the lighting becomes higher than necessary.SOLUTION: In a far-red lighting device 110 for growing plants, an LED chip 123A of a first LED light source 120A faces the direction deviating from a vertical direction V, and an LED chip 123B of a second LED light source 120B faces the direction symmetrical to the direction which the LED chip 123A faces with the vertical direction V as a symmetry axis.SELECTED DRAWING: Figure 1 【課題】植物育成用遠赤色照明装置として、ＬＥＤ光源を用いる直管型の照明装置を用いた場合に、照明直下の放射照度が必要以上に高くなってしまうという問題点に鑑みてなされたものであり、照明直下の放射照度を下げることで、均一な育成を実現することのできる植物育成用遠赤照明装置及び直物育成用遠赤色照明装置を用いた植物の栽培方法を提供する。【解決手段】植物育成用遠赤色照明装置１１０は、第１ＬＥＤ光源１２０ＡのＬＥＤチップ１２３Ａが、鉛直方向Ｖから外れた方向に向けられており、第２ＬＥＤ光源１２０ＢのＬＥＤチップ１２３Ｂが、鉛直方向Ｖを対称軸としてＬＥＤチップ１２３Ａと対称な方向に向けられている。【選択図】図１