Very cool picture. I did quite a bit of enhancing on it. Here's the result.
You can see the sky int the distance (blue) and the trees.
And the 4 lights. The reason they are lines is becomes it seems they were moving.
At first I thought the camera was moving but there is no motion blur in any of the rest of the image.
So that leaves the fact that the lights were moving. VERY cool photo. Can't tell you what it is.
Where was it taken? Did you see any lights while it was taken? Any distant lights?