PROBLEM TO BE SOLVED: To provide lighting systems which can adjust the light intensity ratio of blue light and red light simply, to provide lighting control methods, and to provide plant cultivation containers.SOLUTION: A lighting system 100 comprises a light-emitting module 10 having a blue LED light source 12b which emits the blue light having a luminescence peak in the blue region from 400 nm or more to 470 nm or less, and a red LED source 12r which emits the red light having a luminescence peak in the red region from 610 nm to 680 nm； a light adjustment part 101 controlling a first light intensity which is a light intensity of a luminescence peak in the blue region and a second light intensity which is a light intensity of a luminescence peak in the red region, in the luminescence spectrum of the light emitted by the light-emitting module 10； and a time check part 102 for measuring time, the light adjustment part 101 changing the second light intensity in conjunction with the first light intensity of the light-emitting module 10 according to the measured time measured by the time check part 102.SELECTED DRAWING: Figure 3【課題】簡便に青色光及び赤色光の光強度の比率が調整できる照明システム、照明制御方法及び植物栽培器を提供する。【解決手段】照明システム１００は、４００ｎｍ以上４７０ｎｍ以下の青色領域に発光ピークを有する青色光を発する青色ＬＥＤ光源１２ｂと、６１０ｎｍから６８０ｎｍまでの赤色領域に発光ピークを有する赤色光を発する赤色ＬＥＤ光源１２ｒとを有する発光モジュール１０と、発光モジュール１０が発する光の発光スペクトルにおける、青色領域の発光ピークの光強度である第一光強度と赤色領域の発光ピークの光強度である第二光強度とを制御する光調整部１０１と、時間を計測する計時部１０２とを備え、光調整部１０１は、計時部１０２によって計測された計測時間に応じて発光モジュール１０の第一光強度に対する第二光強度を連動して変化させる。【選択図】図３
