How do I fade up a light to fill a room evenly?

Hi knowledgeable Unity folks!

I just started learning Unity and am trying to create a scene but ran into a hitch. I want to create lighting effects like in this video:

http://www.youtube.com/watch?v=v7gL9EGFALo

Lights that trigger when a user toggles a switch and that emanate from a point source and wash over the scene evenly.

I've read as much as I could about light mapping, baking lights and dynamic lights but it's a lot to get a grasp on to find what approach would be best to get this effect. Any help or advice would be much appreciated, thank you!