When our scene is in night scene, we are going to need some addition lights. We are going to use instance to copy our lights so later it would be easier for us to change the light value. And the light direction is from the window to the inside part of our building so when we animate the interior of the building, the same light can be used and the scene will feel more natural.
As for the camera, though we can move the camera manually using autokey, in this tutorial we will attach the camera into a line, so that the movement of the camera can be set using a particular path. For that, we will use path constrain.