SAD Light Therapy is a form of light therapy for those suffering a particular type of depression – Seasonal Affective Disorder (more commonly known as SAD). For people who live in countries where their winter climate is long and dull, or where they have long nights and short days, people can suffer from depression whereas they may find they don’t during summer, more brighter months.
This “seasonal” condition is due to the fact that there is limited or no sunlight. Our bodies need sunlight to function properly. Apart from getting the right nutrients from it, it also stimulates the production of melatonin and seratonin in the brain through stimulation of the pineal gland.