I'm trying to understand what the purpose is for moonlight in a reef aquarium. Is it functional to the livestock, or simply aesthetic? I've heard two perspectives:
1. So-called "moonlight" is a low-power light of a color that is imperceptible by livestock in the tank. The purpose is to allow the hobbyist to observe nocturnal activity in the tank without disturbing the fish, etc.
My response: Shouldn't we use red lighting to avoid disturbing livestock? Moonlighting is usually blue, right?
2. Moonlight brings out some fluorescence in hermatypic life, like corals. It further mimics a natural light cycle in the tank and stimulates more coral growth, marine breeding behavior, etc.
My response: If you stimulate coral overnight with moonlights, do they ever get time to rest and repair?
Thus, I'm left with the following unanswered questions. Would love to know what you experienced reefers have to say.
* I read that moonlight fixtures are around 455-475 nm. Why is the light blue if moonlight is reflected sunlight? Aquarium Lighting Selection Guide: Which Aquarium Lighting System is Right for You?
* How many watts of moonlight is appropriate for a given size of tank? Is it essentially weak actinic lighting?
* Does the addition of a lunar photoperiod affect the behavior of tank inhabitants?
10 G marine reef
1 chromis, 1 false percula clown, 7 hermits, 2 snails
pumping xenia, ricordia, button polyps, green BTA