There has always been fascination of the moon,especially moonlight! Over the centuries, people with severe mental illness often claimed that they were only "un-balanced" when the moon was "full". It is where the word Lunatic comes from. People "bathe" in the moonlight.Cast spells in the moonlight.Leave charms or amulets to be "blessed" by moonlight. Spells are cast according to the "phases" of the moon. Yet, the moon, when it's visible, is always full! The "phases" are merely caused by the Earth moving between the Sun and Moon.The Moon is there all day,too; but the light of the Sun is too strong for us to see it.
As for "moonlight". The moon doesn't have any light.It's black!
Now, this is not my opinion; it is proven fact!
But, of course, you may believe anything you wish.