Is There A Right Way To Do A Paranormal Investigation?

Just saw last week's Ghost Adventures. Something very interesting happened. I was at my son's apartment watching the show with him. And, we had a very interesting conversation afterward. We noticed when they were using the thermal image camera they scanned the desert outside the mission where they were investigating. And, they saw an image of a "person" with no legs in the center of the desert. So, me and my son both came to the same conclusion; an entity doesn't need energy to materialize. I've seen this before in other paranormal shows. They always say you need electricity, batteries, equipment, limestone, even energy from "live" people. To make it easier for them to form. Really? Ghost have been around since the beginning of time. They have been written about, talked about, since forever. Ghosts are not just seen at night, or when lights are turned off. The majority of people see them in the day. Pictures, security cameras, have taken of them in the daytime. I've had all my personal experiences during the day. So, what does this all mean? And, who created all these guidelines? I personally believe you can throw all this out the window. But, my son bought up some points. He said,"Why don't they have some lights on when investigating. And, even use candles. Like the way people years earlier use to use when walking around at night?" They'll say it's quieter in the evening. But, that's not totally true? A lot of animals roam at night. And, critter crawl indoors in the late evening. Which causes a "different" kinds of noises. Bottom line, there's no right or wrong way. An investigator should ask one main question. When did you have your experience. Night or Day. And, do the investigation when they explained when they had the experience.