I hate horror films, i really do, especially the ones that make me jump off my seat.
In all honesty tho, the image below was not captured while watching one. For my sake, it was about 14:00 when the picture was taken in full daylight.
To give the impression of dark, the aperture was stepped down to a very small value; the ISO as well. There are 3 speedlights in the picture.
One through a softbox on camera left 1 meter away from me, one bare flash in front of me, at a distance of 2m gelled using a blue gel and a third one behind the lamp (table lamp is not turned on really)