| 摘要 |
A light radiator for use in the cultivation of fish is described. The device includes a light guide for introducing light rays therein through its end portion and emits the same through its peripheral surface, a first-transparent container for hermetically accommodating therein the light guide and a second semitransparent container for hermetically accommodating therein the first transparent container. The second container is placed in water so as to outwardly project the light through the semi-transparent container. |
