Sleep and moods are both important for all of us to feel at our best. Light therapy, if used properly, can help both, especially during autumn and winter times
Chances are that you already are (or should be) using light therapy and there are many different types of devices. Recently I came across this new one called Re-Timer made in Australia. It's expensive, but if money is not an issue, I like it, because it's more convenient to ware the light on your head, like glasses (or over your regular reading glasses), than to sit in front of it for long time. Let me know if you use any type of light therapy and how you like it.
Pictures from the Red Ferret article.