YES. Well indirectly. My mom lives on the east coast and winter is dreary. So I sent her a light box (they have another name, but I don't remember) that simulates the rays. A spectrum light maybe? She set it up in her office (it was small, desktop size) and had some success with it.
I love yoga and need to get back into it. I have insomnia and tried the music that supposedly readjusted the various patterns that you are supposed to have. It didn't impress me. Also tried subliminal messages. Was not impressed. But if this stuff can't hurt, I see no reason not to try it.