Light shine at and through objects

The type of light that I am using is spot light. When I shine it an object, it will lit up the object and anything else that are behind it. How do we stop it from lighting anything behind it?

I was hoping to know the answer to this as well but I googled it out of curiosity instead of waiting for someone to answer. Turns out the only real way stop that is to turn on real time shadows which requires the Pro Version of Unity. If you have the pro version I’m guessing just do that and it’ll work but if not I don’t know what to tell you :confused:

Didn’t read the whole thread, there might be someone in there with a work around but from what I briefly read, that’s the only real solution.
http://forum.unity3d.com/threads/light-passes-through-walls.56907/