Looks like they meant "gaslight" but I did find it on Urban Dictionary:
ghost light
Lighting in a video game that has no apparent source for the light to come from. Its like going out on a bright day, but not being able to find the sun in the sky even though the surroundings are brightly lit. Dead Rising on XBOX is a good example.
ghost light
Lighting in a video game that has no apparent source for the light to come from. Its like going out on a bright day, but not being able to find the sun in the sky even though the surroundings are brightly lit. Dead Rising on XBOX is a good example.
http://ghost-light.urbanup.com/2450357