Cut the lights on

What part of Oklahoma? I've lived there most of my life, and don't recall hearing that one. There are parts of the state I don't get to much though.

My guess based on your other info is that it would roughly coincide with the portions of the state that use the word "coke" to cover all carbonated beverages (it's "pop" in my part of the state).

If so, I'd further postulate that this is likely a feature of the Southern American English dialect. All one can really say about dialects is that ones that aren't yours tend to sound weird, sometimes even funny or downright wrong to you. As SAE isn't one of the "prestige" dialects of English, it is particularly vulnerable to such attacks.

Back in the day, switches were knife blade switches and the blade actually cut into the saddle, which meant to cut the light on/off. This was long before switches, as we know them, existed. Nothing Southern associated here. Knife blade switches are still in use in some places today.