In conclusion, R light has disadvantageous effects on the photosynthetic efficiency and increased growth rate in thalli of P. haitanensis. Both antioxidant enzymes activity and the NPQ coefficient were increased. P. haitanensis can benefit from blue, green, and fluorescent tubes light. The light wavelength treatments in mariculture of red macroalgae can be used to operate pigment composition and enzymes activity, and further investigations are required to disclose how the spectral light regulates the biosynthesis process.