Horror.com Forums - Talk about horror. - Anyone familiar with the name of this movie?

Hey guys,

There is a horror movie I saw about 10 years back, it was about a family who moves in to a house, find the picture of 3 men who were apparently a ghost/devil? which gains power in darkness.
... and I think there was a scene where either the wife or the daughter of the father had to stab father's throat as he was chocking or something..

I remember the ending as a car going into a cave with a boy....

lol, It's been ages since I saw that movie, I would like to watch it again but I have no clue what the name of the movie was.

If anyone knows the name, please let me know. thanks :)