Live in mobile home and cleaning light fixtures was water in covers. Nothing else was wet. Only found in fixtures down by a/c unit, could that just be condensation for being hot then cold from a/c being on? Or do I need to call someone?

Could be condensate leak or rain leak, we can't tell. Can you get access above the light?

Living in a mobile home is a pretty closed up environment. It sounds like condensation to me. Maybe you should open a few windows, by a dehumidifier to compensate for the more then wet environment.

Maybe you should check light fixtures more often