Seasonal affective disorder, also known as seasonal depression, causes depressive symptoms during only certain times of the year... and there's a pattern to it?!
There's actually something 
called "light therapy."
Man könnte etwa eine
Licht-Therapie machen.
Hay algo conocido como "terapia luminosa".
Hay algo conocido como "terapia luminosa".
Il en existe un par luminothérapie.
Esiste una terapia chiamata "fototerapia".
Tem algo chamado "terapia da luz".