Lighting workflow questions

Workflow wise, I found something that works well enough for me now. Most of the example scenes I’ve seen have had everything under a single top node. I’ve gone through and put stuff in different folders to organize it better. With the lights, I’ve grouped them into folders by their type and if the are somehow otherwise the similar in some way. Makes it easier for me to turn on and off groups of lights so I can see what they’re doing. I just need to understand how to remove whatever cached volume(?) lighting is going on so I can actually get back to pitch black and start from scratch.

Just curious, does most of the games industry work this way with a flat organization and every light just called point1-point297? That seems like a REALLY difficult way to work.