PROBLEM TO BE SOLVED: To provide a lighting system capable of reducing fatigue in working by improving amenity.SOLUTION: In a lighting system emitting illumination light by the emission of an LED element to perform lighting, an area where a spectrum of the illumination light is in the range of 600-700 nm is 30% or more and 70% or less, and an area where the spectrum is in the range of 400-500 nm is 20% or less, respectively, relative to an area where the spectrum is in the range of 400-800 nm. The spectrum of the illumination light has a maximum value at between 600 nm and 700 nm, and a maximum value of the spectrum at between 500 nm and 600 nm is 70% or less relative to the maximum value.