This is a good drawing, probably the best one I've seen you do. You do a good job with the light, but if you want to take it one step further, just look aroudn in your room or wherever at beams of light and you'll notice that when it hits the bear, the light is going to spread out based on the surface of the object. In this case, ths light would be hitting the right side of the bear. The seam would probably start to fase back into dark again. You did a cool job with the left arm. THat lighting looks very believable based on what you already illuminated.
drawn in 24 min