CIRCADIAN RHYTHM, LIGHT & SLEEP: Our amber, 1600K color temperature book light emits a warm, gentle light similar to fire or candle light that is 99.94% free of blue spectrum light. At nighttime, 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 perfect for reading at night without disrupting your circadian rhythm. LIGHT WEIGHT & TRAVEL FRIENDLY: Our blue blocking, amber book light is not only sleep friendly but also travel friendly as it is lightweight and portable, making it hardly noticeable when attached to a book or e-Reader, and features a strong, sturdy grip to ensure the light stays where it is clipped. It easily fits in a bag, purse, or briefcase and is perfect for reading on planes, in bed, in the car, camping and more! READING IN BED AT NIGHT: Our book light allows you to read in bed at night without disturbing your sleep, your babies sleep or your partners sleep. The reading light features a flexible, 360 degree gooseneck which allows you to create the perfect reading space and position the light exactly where you want to. Our light is also great for getting up in the night to tend to children or babies without disrupting their sleep cycles. 3 brightness levels allow for a customized lighting experience! EXTRA LONG BATTERY LIFE: Our book light comes equipped with an industry leading lithium battery, which is the largest among all clip on reading lamps on the market. You can forget about buying batteries and replacing them all the time with our book light, since all you need to do is plug it in and recharge it. It features an extra long battery life and comes with an included 3 foot micro-USB cable!