Van battery question

[Snikwahjm]

We can’t find the door switch. I think it must be computer. I wonder if I need LED replacement of some kind on the ceiling. There is a lot of light. For now I switched the ceiling lights off. I’m trying to keep an eye on the outside lights. Those come on when ever the door opens or the key is touched. I wondered about a switch on the battery or disconnecting it when I’m parked but I worry if it will screw up the computer.