This is a repost of the blog I usually write on, but it was highly relevant, so I am putting it here too....
About a week ago, my roomie finds me in passing and we sit down and have a chat. One of the things she brings up is about my sleeping, and how I have a hard time of it.
She explains that when you get up in the middle of the night to go into the bathroom, you should be careful not to turn the light on. The reason being is that becase when the light hits your eyes, it begins waking up your brain. The light tricks your mind into waking up when it's really time that you should be sleeping. So there should be nightlights in the bathroom, to give you really dim lighting in the hopes of keeping your brain from fully waking.
Makes sense to me.
Now let's look at the magical application of that.
Most magic done under the cover of darkness, but maybe not for some of the reasons that people think. In a lot of literary works, both fiction and (pseudo)non-fiction, those who practiced magic did this at night, in the dark, under the light of the full moon.
Light just enough to sleep by, all those that practice magic would agree that you have to moved into an altered state of consciousness to accomplish these kinds of workings. Well, kids, most of that altered state (natural or otherwise....most moderns tell you it's something they've accomplished, not something that they have to use to induce a different awareness) is akin to sleep..... so.....
...does it make sense now?