First of all thanks for the answer.
The room is a square 6x6 meters room, we will see the geography of the room, but in a different scene, in this one I will not see the windows in the frame. It has two big windows on the opposite wall. The camera will be always facing the bed from the front and from the side. Imagine a lower angle (nearly the border of the bed) in one shoot from the feet of the actors and then from the side on faces, same height.
So you think it would be better to use just one light (diffused trough a light diffusion) to simulate the direct sunlight and another one, smaller, for the pattern ?
I'm planning to use two tungsten fresnels, and one bounced tungsten for a bit of base light in the room (from the ceiling ?)
Could such a setup be fine ?
Again thanks for the advice.