Optimal configuration and three-dimensional light field of fishing lights on a squid fishing boat obtained using a space matrix algorithm

The optimal configuration of squid fishing lights and the rational distribution of the three-dimensional light field are crucial research topics in the field of light-attracting fisheries. In the present study, light-emitting diode (LED) fishing lamps were measured to have a power of 150 W, luminous flux of 1693 lm, maximum luminous intensity of 907 cd, luminous efficiency of 13.0 lm/W, beam angle of 85.125°, and beam axis deviation angle of 1.0625°. A numerical calculation model based on the spatial matrix algorithm was established to determine the effective water volume of the LED fishing lamps. The three-dimensional effective water volume of fishing lamps was then simulated to study the effectiveness of lighting configurations for a type-8154 squid fishing boat. The results indicate that LED fish-aggregating lamps are most effective when the spacing between lamps is 1.0 m, the lamp height above the water is 6.5 m, and the illumination is within the range of 0.1–10 lx. The iso-illuminance line of 0.1 lx has a depth of approximately 37 m and a horizontal distance from the ship of approximately 51 m whereas the iso-illuminance line of 10 lx has a depth of approximately 14 m and a horizontal distance from the ship of approximately 33 m. The total effective water volume under these conditions is approximately 3.0 × 10⁵$m^3$. This paper highlights how the strong anisotropic specificity of LED fish-aggregating lights plays a crucial role in determining specific illumination volumes for the optimal fishing efficiency of light-fishing vessels.