well, there lies the rub…
If you don’t have time for actual testing and practice of lighting, then I am positive a book or a dvd will not sharpen your focus for steping up your knowledge of lighting with any expedious results.
Understanding the art of lighting takes experimentation and practice. As well as understanding camera blocking and camera angles.
So with that in mind, I would concentrate on setting up scenes with a camera and a few actors and block it and then light it. Do this a few different ways and you will understand lighting more than seeing a diagram in a book and trying to replicate it on a real shoot.
If this scenario is not part of your vocabulary then I would focus on magazines like American Cinematographer, international camera guild, etc.. these can give you examples of how other people have shot and lit scenes.
Todd McMullen
Flip Flop Films
Austin
http://www.toddmcmullen.com