This Light-A Lux 10,000 Lux light box is light-weight and has the highest spectrum rated lux bulbs on the market. Here to help fight the winter blues the "S.A.D. Light" (seasonal affective disorder) is energy efficient and provides for reduced magnetic fields and a flicker-free environment. Included are high quality lights, cathode radiation shielding, electronic ballast, and a parabolic lens.