I bought the Sphere Gadget Technologies Lightphoria device for about $60 a few years ago. My moods still are greatly influenced by weather. Overcast days drag me down; bright days perk me up. And November & December is just awful.
The device plugs into an electrical outlet. So in order to use it, I need to stand in front of it as much as possible. A visor would be much better for me given my active lifestyle. There is an episode of Northern Exposure in which Walter was prescribed a light visor and became manic (IIRC). This light doesn't do that (much to my dismay).
At the time I bought it, the device was the least expensive LED product I could find. The cheaper ones used fluorescent bulbs, which would dim over time and need replacing. The nice think about LED is that the "bulbs" are stable and last a long time.
I think any lightbox that was proven effective in treating SAD would be covered by medical insurance as DME.