In the movie The She Wolf of London one of the characters places a lighted lantern in the window as a way to ward off a werewolf; turns out there is actually no werewolf in the story.

Was this just for the movie or is there actually such a legend?

I've looked around to see if I saw that as a way to ward off werewolves. I have never heard of that myself. The old silver bullet would be my best bet. The closest thing I saw to that was that people would build bonfires to ward off evil spirits.

I've seen just about every current scary movie there is in the US, is this an older movie, I've never heard of this ,I know about silver and isn't there also something about roses?