Plugs into AC.
Just 30 minutes of exposure to the light from this slim box can block the release of melatonin, a sleep hormone. Desktop Light Therapy Lamp The light’s small 5 1/4 x 3 footprint allows it to fit easily on work surfaces, unlike previous generations that take up significant desktop space. 13 1/2 H x 6 1/4 W x 2 D. This desktop light delivers 10,000 lux of daylight spectrum light to counteract the effects of work fatigue, jet lag, and seasonal change.