Hi, My ds is roughly the same age and we have the same kind of issues. He's always undefoot, not interested in toys, very short attention span. Maybe it's the age?

I think the way to go is survival tactics, iykwim. Put a sock on the door handle so he can't open them. If he must climb (and for my ds, it's a must), make the area as safe as possible, sand warn him that he can climb, but he must be careful and if he falls it will hurt. Then leave him to it.

With the lights, if it's become a bit of an obsession, I'd cut him off altogether- no more lights, at all, bad luck. But I'm a tough mean mummy like that

HTH. Hang in there, it won't last forever.