I watched this one anime when i was a kid what is it?

a few years ago when i was up watching adult swim and this anime came on where the people lived on islands in the sky and they had powers from the sun. this one guy came out of a big blimp and blocked out the sun but could still use his powers because he said he bathed in sunlight for months at a time.he fought a women with a child beside her i believe. i had only seen that small part of the anime but i really want to watch it.