Light Study and stuff

So I've been trying to be more efficient with my brush strokes, and I've gone into doing some light studies.

The first guy didn't go too well, but the second one was pretty good.

Also been reworkin' a concept. So far it's a great improvement over my attempt months ago, but the skin around her face doesn't look too convincing. Somehow I got her shoulder and lower left arm alright but her face just isn't workin'. I also feel her legs look a little small as well. I'll post more progress as I go along.