Aquaculture illuminator, illuminating system and illuminating method

An aquaculture luminaire (10, 12) produces upward light (26) and downward light (24) under the water surface. The upward light (26) is all directed at an angle with respect to the vertical greater than a threshold angle. The light division between the upward direction and the downward direction may be configurable. Alternatively or additionally, the threshold angle may be configurable such that it ensures that the light exceeds the angle of total internal reflection at the water surface. In this manner, the luminaire may be adapted to the intended installation location of the luminaire and/or to predominant surface conditions (e.g., waves). 一种水产养殖照明器(10，12)在水面下产生向上光(26)和向下光(24)。向上光(26)全部以相对于垂直方向的大于阈值角度的角度被引导。在向上方向和向下方向之间的光划分可以是可配置的。替代地或附加地，阈值角度可以是可配置的，使得它确保光超过在水面处的全内反射的角度。以此方式，照明器可适应于照明器的预期安装位置和/或主要的水面条件(例如波浪)。