Ghosts of the Light - triptych

I had three hours for painting class at school. Usually I make one painting in this time, but last Sunday I've finished one in a half of an hour, then walked around, decided to make another and yet there were 45 minutes left.
So I made the third.
The order of making these, for the curious ones:
Right
Left
Middle

Here are single ones, if you want:
Left Middle Right

I had a model before me. For those, who would like to know.

Let me know, what you think about it.