UltraLux I Light Therapy light box with 10,000 lux for treating symptoms of Season Affective Disorder (SAD). The only fully dimmable full spectrum light therapy light box on the market! Safe effective features found nowhere else. Uses the highest quality full spectrum bulbs to produce 10,000 Lux at 15 inches and 5,000 Lux at 25 inches. Unit is a compact 9 inch by 11 inch. Recommended for applications where you can sit within 25 inches of the unit and you will not be moving around. Easy to Use Ideal for desk or table-top applications, Computer work stations, Small desk top applications, College dormitory work areas, Kitchen table top areas, Vanity work stations and more.