Verilux SmartLight Natural Spectrum Productivity Clip Desk Lamp Clean and balanced Natural Spectrum light brings daylight indoors providing illumination with greater contrast and true color rendering. A perfect, compact clip light for working, studying, tasking, and excelling - position anywhere indoors. Flicker Elimination Technology and Optix Glare Control virtually eliminate fatigue and eyestrain. Energy efficient lighting system provides the equivalent of 60 watts of incandescent illumination from a 13 watt bulb. Solid metal shade and flexible neck with cloth cover provide years of service and reliability.