book light, amber, rechargeable, blue light blocking clip-on led reading light by hooga. 3 brightness. 1600k temp. eye care light for strain-free, healthy eyes. gift for students, kids, book worms. hooga the hoogalite is a non-blue light emitting clip-on reading light that emits only a sleep friendly, amber hue which reduces eye strain and helps the body maintain a natural circadian rhythm. before the days of smartphones, led tvs, and bright fluorescent lighting, our ancestors would spend their evenings reading and socializing over firelight or candlelight. amber light such as candle light contains extremely low levels of blue spectrum light. the problem with blue spectrum light is that it is especially effective at signaling the body to wake up, be alert, and stay awake. in the evenings, particularly after the sun sets, we need to limit our exposure to blue light. the hoogalite emits only 0.06% of its light from the blue light spectrum, encouraging the body’s natural secretion of melatonin to promote a more restful, deep night of sleep like our ancestors used to experience. with a 1200mah lithium ion rechargeable battery, you’ll have up to 30 hours of sleep friendly, amber hue light to enjoy on a single charge. don’t be fooled by other reading lights boasting longer battery life, either, as those exaggerated times are based on 10% power settings. the hoogalite offers two power settings, 50% which emits 35 lumens and 100% which emits 70 lumens. a flexible, 7-inch gooseneck allows you to customize your lighting experience and cast a gentle, amber hue in any direction you please. this can be especially useful when reading in bed with a partner, so as to not disturb them while they sleep. the hoogalite weighs just 2.5 ounces and can be rolled up and packed conveniently into a purse, briefcase or travel bag for use on the go. so grab a book, turn down the overhead lights, clip on the hoogalite and rest assured that you’re doing your circadian rhythm, your sleep, and your overall health a huge favor!