Special spectral lighting is necessary for marine aquaria, which differs considerably from natural sunlight because marine water works as a light filter. As the human eye has different sensitivities for different parts of the spectrum, the visual brightness of our assemblies is different.
The quantity of LED radiation on the assemblies is more informative as it shows how much light there actually is, not how well the human eye can see it.
When choosing the assembly type, take into consideration the average performance coefficient of LED's on the assembly calculated for their maximum working current. The higher this value, the more power savings you will have, which can be substantial over the years of LED luminaries operation.