The Original Natural Spectrum® Desk Lamp utilizes over 50 years of research expertise to create a versatile and practical lamp. Verilux® Parabolic Grid Diffuser eliminates glare and gives colors vibrancy. Flicker Elimination Technology® reduces fatigue, eyestrain and headaches. A flexible gooseneck and 2 levels of illumination place indoor daylight exactly where you want it. The Original also has an advanced electronic ballast system that assures no-buzz operation; instant-on, flicker-free illumination and zero power usage when the lamp is off. Included Verilux bulb uses Trucolite Phosphor Technology® to produce original full-spectrum indoor daylight. Bulb delivers 150W of light from 27W and lasts 10,000 hours--more than 10 times the life of traditional bulbs. UL listed in United States and Canada. 1-year limited warranty.