DESCRIZIONE
An aquarium lighting system has a set of lighting elements (30) each with a beam shaping element (60, 70) for passing first light which is emitted from the lighting element at an angle to the normal below a threshold and for processing second light which is emitted from the lighting element at an angle to the normal above the threshold. The processing gives a greater amount of scattering compared to the passed light so that direct light at steep angles is avoided.