AC plug.
11 3/4 H x 7 1/2 W x 1/2 D.) With less melatonin, people find they have increased energy levels and alertness. Mood Enhancing Therapy Light It has four brightness levels, three color temperatures, and a built-in timer. This is the desktop lamp that delivers 10,000 lux of daylight spectrum light to counteract the effects of work fatigue, jet lag, and Seasonal Affected Disorder (SAD).