Season Affective Disorder- shopping advice

I promised myself last winter that THIS winter, I would buy light therapy objects to try to help me avoid turning into a heap of crap. Every winter gets a little worse, and last winter was the worst yet. If there is worse than that, frankly, I don’t want to know about it.

I’ve managed to scrape together about $200, which seems to indicate that I can afford either a very nice dawn simulator OR a bottom-of-the-line light box.

I could use some advice about which way to go on this.