[MrAwesome]

Yeah, as other commenters have said - the curtains are for bright city lights I can't turn off.

Personally, I have a simple electrical timer set to turn on a bright sunlight bulb at 6:30am, and I open the curtains during the day.

You're right on the money about camping and how it affects the body, in my experience. Light obviously isn't the only factor in camping feeling good - but I've also been reading lately that light exposure (and possibly direct sun exposure?) during the day is quite good for you.