An alternative approach is to buy a single light intended for filmmakers, which has very high CRI, a smooth emission spectrum, and adjustable intensity and color temperature, such as the Smallrig RC120B (~53k lumens). If you get a parabolic softbox attachment and a desk-clamp light-stand I think this ends up just being superior to a SAD lightbox (except perhaps in cost).
An alternative approach is to buy a single light intended for filmmakers, which has very high CRI, a smooth emission spectrum, and adjustable intensity and color temperature, such as the Smallrig RC120B (~53k lumens). If you get a parabolic softbox attachment and a desk-clamp light-stand I think this ends up just being superior to a SAD lightbox (except perhaps in cost).