The scale I am using is the following. This results in a sharply peaked full moon intensity. This is being done during my 3 month experiment leading to inducing coral spawning. Corals and fish do need a natural rhythmic moon cycle. Experiments have shown that without moon light corals lose their natural sync and dont spawn or spawn very irradically.
Some fish also key in on moon cycles.
I wonder what the actual difference appears like in nature. Note - The chandilier is not directly over the top of the tank. This means I am probably using 3 - 15 watt bulbs hung 2 feet over and 1 foot in front of the tank. These are soft white bulbs. Will work for free.