Since the traditional fishing lights need waterproof structures to protect their internal lighting, they usually are heavy, expensive, and non-durable. Additionally, the traditional ones mainly use incandescent light as their light source so that it would face the problems of high energy consumption, high brightness attenuation and high damage rate. And the power generation cost may be as high as 50% of the entire ship’s oil cost.

The so-called “aquaculture net” refers to a method by using a fixed purse seiner in a specific range of seawater to raise many aquatic animals. This method has some advantages, such as not occupying land and water resources and having high productivity per water unit.

Agricultural products pre-cooling refers to removing field heat and accumulated respiratory heat from agricultural products before transporting, refrigerating or processing so that the crops can cool down quickly. Pre-cooling should be completed within a few minutes or hours after harvesting to keep the freshness in time.