What are these freaky lights in my woods?

I live in suburban northern maryland and I have woods in the back of my house. Ok so I've seen these strange, flashing, white lights in the woods several times now. They are always near the edge of the woods. The freakiest thing about it is that the lights move around. One second one blinks near the ground and then another one blinks near the top of a tree. They resemble fireflies, except it can't be fireflies because these blinking whatevers are much brighter, they happen only after dark, and they are not that neon color. But the way they move and flash resembles lighting bugs. They also kind of look like the lights of an airplane tower, but they can't be because A: They are right at the edge of the woods, B: they blink with no pattern, and C: there is an airplane tower visible from my house and they really look nothing alike. Everyone in my house has seen it and so has my neighbor, so naturally this is kind of scaring the shiitake mushrooms out of me and has inspired several theories (my dad thinks it's ghosts from the civil war). I'm hoping someone has a reasonable (I hope non-frightening) explanation before my dad calls ghost hunters.