Artificial light plays an important role in commercial light fisheries as a means to attract fish, such as the Pacific saury and squid. To gain an insight into the optimal allocation of light-emitting diode (LED) fishing lamps in the Pacific saury fishery, we present a mathematical illumination model to describe the illumination characteristics of LED modules installed at different angles. The validity of the numerical model was evaluated against the results of an optical experiment and statistical analysis. The results indicated that the agreement between observed and modeled data was good, with a mean error of 8.83%, and that the light distribution varied greatly depending on the angle. The light intensity of the LED module was distributed in the form of a series of concentric circles in the light field. With increasing angle, the maximum illumination decreased and moved away from the light source; also, the horizontally illuminated distance increased but the rate of increase gradually decreased. The illumination attenuation showed different modes between angles after passing the position at which there was maximum illumination. These results could help to further reveal the effects of LED fishing lamp allocations (e.g., installation angle, height, and interval) on underwater illumination characteristics for the optimization of the onboard lighting system and the regulation of the power of fishing lights in the future.

人造光在商业性轻渔业中起着重要的作用，作为吸引鱼类的手段，例如秋刀鱼和鱿鱼。为了深入了解太平洋秋刀鱼渔业中发光二极管（LED）钓鱼灯的最佳配置，我们提出了一种数学照明模型来描述以不同角度安装的LED模块的照明特性。根据光学实验和统计分析的结果评估了数值模型的有效性。结果表明，观察到的数据与建模数据之间的一致性很好，平均误差为8.83％，并且光分布随角度的变化很大。LED模块的光强度在光场中以一系列同心圆的形式分布。随着角度的增加，最大照度降低并远离光源；同样，水平照明距离增加了，但是增加的速率逐渐减小了。在经过最大照度的位置后，照度衰减在角度之间显示出不同的模式。这些结果可能有助于进一步揭示LED钓鱼灯分配（例如，安装角度，高度和间隔）对水下照明特性的影响，以优化船上照明系统并在将来调节钓鱼灯的功率。在经过最大照度的位置后，照度衰减在角度之间显示出不同的模式。这些结果可能有助于进一步揭示LED钓鱼灯分配（例如，安装角度，高度和间隔）对水下照明特性的影响，以优化船上照明系统并在将来调节钓鱼灯的功率。在经过最大照度的位置后，照度衰减在角度之间显示出不同的模式。这些结果可能有助于进一步揭示LED钓鱼灯分配（例如，安装角度，高度和间隔）对水下照明特性的影响，以优化船上照明系统并在将来调节钓鱼灯的功率。