PROBLEM TO BE SOLVED: To provide an environment-friendly lighting system and a phosphor which can be expected to further improve at least either one of plant growth inhibitory effect (photosynthesis inhibitory effect) and blooming disorder inhibitory effect, while emitting white light.SOLUTION: The invention is characterized by using Dy-containing phosphor which emits white light with a luminescence peak in the range of 470-490 nm and in the range of 570-590 nm using near ultraviolet ray with a luminescence peak in the range of 300-400 nm as an excitation light. An emission spectrum thereof does not include a light with a luminescence peak in the range of from more than 400 nm to less than 470 nm and in the range of from more than 590 nm to less than 650 nm, and hardly has luminescence in the range of 430-460 nm and 500-550 nm and 600-640 nm.SELECTED DRAWING: Figure 1【課題】白色光を発するとともに、植物生育抑制効果（光合成抑制効果）及び開花障害抑制効果の少なくとも一方のより一層の向上が期待できる環境調和型光源装置や蛍光体を提供する。【解決手段】３００～４００ｎｍの範囲に発光ピークを有する近紫外線を励起光として４７０～４９０ｎｍの範囲及び５７０～５９０ｎｍの範囲に発光ピークを有する白色光を発するＤｙ含有蛍光体であって、その発光スペクトルは、４００ｎｍ超４７０ｎｍ未満及び５９０ｎｍ超６５０ｎｍ未満の範囲に発光ピークを有する光を含まず、４３０～４６０ｎｍ及び５００ｎｍ～５５０ｎｍ及び６００ｎｍ～６４０ｎｍの範囲にはほとんど発光を有さないＤｙ含有蛍光体を用いることを特徴とする。【選択図】図１
