Abstract: A light source module includes a wiring board and a LED array electrically connected to the wiring board. The LED array can be driven to emit a first group of emission peaks in 300 nm??max<450 nm, a second group of emission peaks in 450 nm??max<550 nm, and a third group of emission peaks in 550 nm for matching the spectrum of sunlight underwater. When the maximum peak intensity of the emission peaks in the second group is taken as 1.0, the peak intensity Ia of each emission peak in the first group is in a range of 0<Ia?0.9, and the peak intensity Ib of each emission peak in the third group is in a range of 0<Ib?0.9. Accordingly, the light source module is suitable for aquatic species and can enhance growing rate of the aquatic species.