The lightwedge is an efficient book light with a streammlined design. A lighted, distortion-free acrylic lens extends across the book page, reducing shadows and glare.Since the light is emitted directly onto the page, there's no excess reflection to disturb others ***** lightwedge is thin and lightweight and easily slips into a backpack, totebag, or briefcase.Also when not in use, it is useful as a convenient bookmark stored between a book's ***** Bright LEDs that illuminate the lightwedge have two brightness levels and  a lifetime ***** light can run for 40 hours on four AAA ***** lightWedg can rest on the left page and then simply be flepped over to read the right page.  
The LightWedge has these great features; 
* Thin and lightweight  
* Distortion-free, optical-grade acrylic lens 
* Sturdy, easy to handle  
* Also useful as a bookmark  
* Eye-friendly LED illumination  
(no bulbs to burn out)  
* 40 hours of light on 3-4 AAA batteries  
* Two brightness levels  
* One-year warranty for the unit  
*Lifetime warranty for the LEDs  
*Dimensions: different size for kinds of books