I use the 10,000 units of Vitamin D3. And that was the game changer for me, as it has been far more effective for me as I dont have a special light.

I do wonder if dumping the conventional cooking oils like corn oil, soybean oil and canola oil has also played a part.

The latter change co-incided with the higher winter dosing of vit D3, so perhaps both working together have knocked SAD completely out of my life. As I remember, Dr Eades talks about all the good food choices, and eliminate the high omega 6 oils.