Concerning the first version ( larger image): To me, the light is convincingly coming from the right and seems to be natural sunlight from a window. The wall? behind seems to be very close to the edge of the table. Perhaps smaller strokes on there would help it to recede, or if that is not intended, then some relected light from the table indicating the table is next to the wall.
I would show part of a window on the right with the high value color from outside. This would break up the large violet area giving the eye another place to go around.