the original mighty bright nuflex rechargeable book light, 35 lumens of warm eye-care light, 3 brightness levels, 24 hours of battery life, durable, flexible (midnight blue) mighty bright one of our best-selling book lights, now rechargeable! ideal for: illuminating large books, multiple pages, and large surfaces with bright, warm light. but with its durable, soft-touch silicone gooseneck and strong-grip clip, you'll find unexpected uses for this versatile light.