I noticed my interior lights & my dashlights,window switch, and heater switch l on 1999 Mercury Grand Marquis

the lights for all the above come on after the car is shut down. The lights don't come on right away.If I check my car in say ahalf hour or more I see all the above lights on,but their not as bright as if I turned them on.

Asked by for the 1999 Mercury Grand Marquis