There are certain kinds of sun-simulating lamps you can buy which have helped some of my friends a great deal. I can only live in sunny Arizona apparently (Alaska, Seattle, some other places were no good for me).
Oh, I know. My doctor wanted me to get a light box, and even submitted the paperwork to try and get my insurance to approve it. At that time, a fairly cheap one with full-spectrum light was close to $800, which was way over my budget without the insurance. Then, when they finally did approve it, I couldn't get it because of some problem with the company not having a proper code, or some such BS. So I never got it.