The HappyLight® provides up to 10,000 lux of Natural Spectrum® Daylight to combat the effects of seasonal change, "winter blues," shift work, jet lag, malaise and fatigue. Natural Spectrum Daylight cues the body's natural energy enhancers, improving mood and energy levels and creating an overall sense of well-being. Balanced Natural Spectrum Daylight gently helps the body recalibrate and stabilize, reducing fatigue and lethargy and improving focus and concentration. Electronic ballast and Flicker Elimination Technology™ assure no-buzz operation and instant-on, flicker-free illumination. Table-top stand and space-saving wall mount option. On-off switch. UL listed in United States and Canada. 1-year limited warranty.