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Blue lights at night on and blue moon lights are the worst idea that has ever come to the users and manufacturers of aquarium lighting. Moonlight isn´t blue, in fact it is much less blue than daylight, look here. In fact you can see it with your bare eye: Look at the moon, is it blue? Is it maybe only bluish? No, it is yellow and so is its light. The impression that the landscape is bluish under moonlight is caused by human seeing which looses the ability of color seeing at this low light levels and creates the impression that the moonlight is blue.
Blue light is the light that regulates circadian rhythms (day-night-rhythms), mainly through the cytochromes, receptor pigments of nearly all life forms, from bacteria and yeasts to humans. When blue light is on the signal is that there is no dark period which can disturb corals severely and will not make fish lucky.
The bright (nearly) full moon shines only for a few days a month not all month long and in fact it shines really bright only around midnight, at moonrise and moonset it is much less bright. If you want to use some light to watch your tank at night use a warm white light or even better use a torch for the moment you want to look into the tank. Also for visual seeing of fish a white light might be more adequate than blue light.
Blue light is the light that regulates circadian rhythms (day-night-rhythms), mainly through the cytochromes, receptor pigments of nearly all life forms, from bacteria and yeasts to humans. When blue light is on the signal is that there is no dark period which can disturb corals severely and will not make fish lucky.
The bright (nearly) full moon shines only for a few days a month not all month long and in fact it shines really bright only around midnight, at moonrise and moonset it is much less bright. If you want to use some light to watch your tank at night use a warm white light or even better use a torch for the moment you want to look into the tank. Also for visual seeing of fish a white light might be more adequate than blue light.