Thinking about a Home Theater

We have a good sized home and we have an extra room. Well it was recently used for an exercise room but when it got too hot in North Carolina then I moved that to my room. Well that extra room we could use as a Home Theater if we wanted to. So lets say we did then we would have to get some kind of home theater lighting going on to make it feel like we were really at the movies. I mean what's the point of having a home theater room without the right kind of lighting? So if you had a home theater would you too have to have the lighting going on?