Tri-Color Desk LampCIRCADIAN RHYTHM, LIGHT & SLEEP: Our desk lamp light emits your choice of amber, red or full spectrum 4000k white light. Amber light at 1600K is 99. 94% free of blue spectrum light, while the 625nm red light is 100% free of blue light. At night, it is important to limit our exposure to bright white light to allow for the production of melatonin which allows us to fall asleep faster and get a more restful, restorative night of sleep. Our light is