No, I did not mean to imply that.
Everyone has a reason for having moon lights. Some can get away with only a few nights a month and some need them more often. The requirement to have total or near total darkness comes into play when you want to induce spawning. But you also need to be able to regulate the various moon phases aswell. Anyway you look at it, having them on every night, all night, would be beneficial if you have corals or invertebrates that can benefit from them. Especially if you have corals like the open brains that have two feeding mechanisms. One they use during the day and the other at night. Invertebrates, like Fire Shrimp that don't like bright lighting, would also benefit from them for feeding reasons. Since you would be increasing feeding opportunities, then an increase in growth rates will also occur. It has been my experience to observe that not all corals, zoos and mushrooms derive any benefits from the moon lights since they only have one feeding mechanism which they employ during the day. It's a personal decision on what suites your needs.
The only down side I can see of using them every night is the extra couple of bucks for the hydro.
Larry