Dreamin' Dragon, thanks! I'll add it this evening.
When I was in my 30's, several times I went to bed so exhausted I could not sleep. Just when I am starting to drift off, I would start hallucinating. First time, it was a neon blue helicopter circling overhead. About the size of a toy one. Another time, it was neon blue branches waving back and forth. Several other times it happened, always neon blue. Migraines, pollen allergies, and raising three children wore me out. It is different now, but the neon blue color was wild! With the waving branches, I freaked and jumped out of bed and got halfway down the hall and realized it was just fatigue, I turned on the light and got back in bed. My hubby did not understand. It was vry dark in the house that night, and to this day I sleep with the shutters open so I can see the moon, stars and any lights the neighbors have left on. I cannot handle a totally dark room. <img src="/images/graemlins/crazy.gif" alt="" />
Sometimes lack of sleep can also bring on lucid dreams. Lucid dreams usually happen toward the end of a sleep cycle but can sometimes occur at the beginning if you're that exhausted.
Sleep paralysis is believed to be caused by something in the brainwaves going kabooey as we try to fall asleep. I don't know whether researchers have connected it to lack of rest. They only gave it a name within the past ten years.
I can't sleep with any lights on at all. During bad periods of insomnia, I've actually had to cover up alarm clocks and mirrors. Even though it's dark, small glimmers of light can bounce off mirrors and disturb your sleep.