Look up!

[Anonymoose]

I think those are airships.

http://i1188.photobucket.com/albums/...1312851018.jpg
At first I thought they were Ixali spy baloons since they're over all the cities, but I guess they're just Eorzea's street lights. They move a bit, back and forth across the sky, but I never knew they were there until my settings were just right.