This is original fiction, right?
I wouldn't know about fireflies as we don't have them in this country :-)

"Like something from a James Cameron movie, the lights were pretty" -- James Cameron movies are well known for their prettiness?

"The elderly lady waived" -- ouch, typo :-p

I was actually starting to wonder where the ghost element was going to come into it, but it looks as if the 'fireflies' are going to turn out to be something supernatural; I'm not sure about marijuana-growing spirits, so that may not be directly connected...