Brand new, never used. Helight Sleep emits a narrow bandwidth wavelength (630 nanometers) with a patented protocol of precisely calibrated duration, diffusion and intensity that helps you fall asleep faster and enjoy deeper, more restful sleep. The 630 nm red light is emitted for 14 minutes with optimal intensity and diffusion to help support sleep. Since experts unanimously agree we must sleep in complete darkness, the light was engineered to gradually dims over an additional 14 minutes, ensuring a smooth, uninterrupted transition. Carefully calibrated, this 28-minute protocol reflects the natural cycle of light at the end of the day: warmer light at sunset, biologically interpreted by the brain as the trigger to release natural melatonin.