The few people I know who've claimed to encounter ghosts or spirits didn't need a flashlight. When we first moved to Napa Valley, my wife, daughter and I were essentially homeless as nothing was available. My wife came down with strep throat and a new acquaintance was nice enough to put us up in an historic old farmhouse on her property. My daughter slept alone upstairs in one of the two tiny bedrooms. After one night she refused, preferring to sleep with us downstairs. She saw nothing, but she felt something, a presence of sorts, and was uncomfortable. We later learned from the owner that the house was "occupied".
As a child and teen in Poland, my rebellious artist wife would frequent the local Gdansk graveyards - nothing kinky, she just loved the solitude (this was communist Poland where everyone was watching) and the beautiful statuary. Nighttime in winter was her favorite. She claims to have seen occasional spirits glowing through the night. But she doesn't like to talk about it much. At first she was frightened but it didn't scare her off. She still loves to walk a cemetery at night, any chance she gets. I've gone along but never seen a thing.
Before I was married, I had a Brazilian girlfriend. After a time she confided that she was a Medium and Spiritist. As she described it, Spiritism was a blend of African religious tradition and Catholicism. She claimed to be able to Astral Project ( project herself out of body ), an ability she once demonstrated in my presence. It was enough to make me question my previous disbelief in such things. I still get goosebumps thinking about it! Anyway, eventually I realized that she saw spirits everywhere, and it was a real struggle for her to stay grounded without distraction in "real" world events.
Each of these people is extremely sensitive and perceptive. Whether they are, seeing something, or tuning into something, or just conjuring something, their experiences are very real for them. And the spill over has sent a few chills up my spine, even though I lean toward skepticism.
If you're going to go, bring an open attitude, a red beam flashlight to preserve your vision, and the brightest white torch you've got so you don't trip and injure yoursef as you're running away in terror.