I made a lightbox for my gf, who has SAD to some extent; it used five compact fluorescent tubes in a housing lined with reflective foil. She later found a commercial product was easier to use - about the size of an iron, with a few dozen white LEDs. She could sit that beside her on the pillow, where my light box wouldn't safely fit.

This got me thinking about maybe a better way. Opaque spectacles to act as diffusers with a few battery-powered white LEDs attached to the front of each - less power but much closer to the eyes, so by the inverse square law the same effect. This would be far lighter and use less energy.