People suffering from SAD go through depression, irritability, short temperedness and sleeping disorders that leave them unable to function due to extreme tiredness and weakness. SAD Light boxes are a proven therapy for curing those suffering with SAD and other conditions. There are also many cases of SAD sufferers from people who work on graveyard or night shifts and those who work in buildings that do not get much natural light. Fortunately, however, there is now a device that would treat this condition. It is called a SAD Light Box.