The Caribbean Sun Box Blue is a highly effective new light box that uses blue LED lamps to treat the symptoms associated with Seasonal Affective Disorder (SAD). Blue light is an excellent alternative for people whose eyes are too sensitive for the standard 10,000 LUX white light. Research has shown that a specific, blue wavelength (415nm) is the portion of the visible light spectrum that is most effective in treating Seasonal Affective Disorder. By using long lasting LEDs, we reduce the unit’s size and weight to just 5 ½” x 9” x 1 ¼” and 1 ½ lbs. It easily fits on a desk, table, or countertop and is equipped with a folding stand, UV shield, on/off switch and a 6 ft. cord. Uses only 9 watts of power yet operates on 100-240V without a voltage converter.