The scene with the lights on uses 2 point lights with the area light option turned on and a sphere shape about the size of the bulb.

each one emitting about 100000 photons

The other scene has 3 point lights accross the window, each with an area light of a rectangle shape roughly the width of the window. The highest of the 3 lights with a slightly higher intensity to the others.

I wasnt sure which type of light to use but found point lights had the most mental ray options to play with!

Steve