Plant growth lighting fixture

A plant growth lighting fixture comprising:

• light sources;
• and
• a reflective-type circularly polarizing plate having cholesteric liquid crystal layers formed by fixing a cholesteric liquid crystalline phase,
• wherein when a wavelength range of 380 nm or more and 500 nm or less is a blue wavelength range, a wavelength range of more than 500 nm and less than 600 nm is a green wavelength range, and a wavelength range of 600 nm or more and 780 nm or less is a red wavelength range,
• the light sources have two or more of a blue light source having an emission center wavelength in the blue wavelength range, a green light source having an emission center wavelength in the green wavelength range, and a red light source having an emission center wavelength in the red wavelength range,
• the reflective-type circularly polarizing plate has two or more of a blue-reflecting cholesteric liquid crystal layer having a center wavelength of an effective wavelength range in the blue wavelength range, a green-reflecting cholesteric liquid crystal layer having a center wavelength of an effective wavelength range in the green wavelength range, and a red-reflecting cholesteric liquid crystal layer having a center wavelength of an effective wavelength range in the red wavelength range,
• the wavelength ranges of the emission center wavelengths as the light sources and the wavelength ranges of the center wavelength of the effective wavelength range as the reflective-type circularly polarizing plate are wavelength ranges of the same colors, and
• the reflective-type circularly polarizing plate has a polarization correction layer having a phase difference in a thickness direction.