SomniLight's rechargeable amber book light clips perfectly to books, notepads, and e-readers to provide a relaxing evening experience. This light uses specially designed native amber LEDs to produce a warm color-temperature light, similar to candlelight. Like candlelight, our amber book lights emit only long wavelength light (peaking at 592 nM), free from the blue wavelengths that can block melatonin production and disrupt healthy sleep patterns. Studies suggest that the use of amber light at night can result in up to 90 minutes of increased melatonin production and up to an hour more sleep per night!