The FlexNeck Series book lights from Carson are compact, ultra-bright LED reading lights. Both versions of the FlexNeck booklights have a fully adjustable lamp head that can flex and turn to shine light right where you need it most. The FlexNeck book light (FL-55) contains a single LED bulb with one brightness setting. The FlexNeck Plus (FL-66) is a little more unique in the fact that it contains 6 super bright LED lights with two adjustable brightness settings. Both book lights clip to any size book, magazine, e-reader, tablet and so much more and can be used for convenient table top illumination. Both versions of the FlexNeck reading lights also run on 3 AAA Batteries (not included). At Carson, we strive to make sure our customers are 100% satisfied with the quality of our products. We are so confident in our products that we back them with a Limited Lifetime Warranty. Carson will repair or replace your Carson item if it is found to have manufacturing defects in materials or workmanship. Please contact Carson for additional warranty details.