I've wondered about light therapy as well, read to be careful too with it.
In my state when I Google light therapy some places show up. The float center I will go to offers light therapy sessions, I think I will give it a try.
I tried a tanning bed a few times from the gym, the winter time idk remember right now if I felt it helped.. in the summer I did this too and felt refreshed but I was working out back then too which could had contributed.