Seasonal affective disorder should have gone but still there : (can I still benefit from lamp?

Seasonal affective. A light therapy box is a proven seasonal affective disorder treatment. Light box therapy may be effective on its own. Or, light therapy may be most effective when it's combined with another seasonal affective disorder treatment such as an antidepressant medication or psychological counseling (psychotherapy). Light therapy boxes for seasonal affective disorder treatment are also known as light boxe.
Most likely. Treating seasonal affective disorder: Light therapy can be very effective. Psychotherapy and psychotropic medications can also be beneficial. Consider a tropical vacation when it is cold back home. See: http://www.mayoclinic.org/diseases-conditions/seasonal-affective-disorder/basics/treatment/con-20021047.