Christian Movies/Prodigal Son short film '70's
When I was in college in the mid 80's we saw a short film of a modern prodigal son who wanted to return home. He had written a letter to his parents asking them to leave a light on in the window as a sign that he was welcome to come home. He hitchhikes home and when he gets there is a light on in every window of the house. I don't think this was ever on video and I don't know if it was ever remade. I can't remember the title or who distributed it.
We aren't sure but maybe it's 'A Long Way Home' - here is a link to the information about the film - http://www.christianfilmdatabase.com/review/a-long-way-home/
- let us know if this is it. If not, there is the Prodigal, an old billy graham film.