The Verilux Liberty 7.5K Energy Lamp provides up to 7,500 LUX* of full spectrum light to address seasonal change, the winter blues or the effects of shift work, jet lag, malaise or fatigue. Balanced Natural Spectrum illumination taps the potency of light to gently cue your body to recalibrate and stabilize, naturally reducing fatigue and lethargy while improving focus and concentration. No two people view and react to light in the same way, so this energy lamp features Optiflex: options that let you customize the light output to meet your needs, goals and energy level.