This is my 4th and is by far the best. 1) Bright LED light, two settings (half and full brightness.) 2) Bright enough to light both facing pages at the same time without repositioning. 3) Gooseneck stands high enough to allow page turns without repositioning every time. 4) Clip-on is shallow enough to nestle in the book spine, even when the book is closed, without destroying the binding. (Means you never have to reposition it, even between sittings.) 5) Uses 3 triple A batteries, lasts much longer than book lights using the flat 2032 batteries. 6) Did I mention the bright white LED light? Far better than the older incandescent bulbs. Also throws a wide spray (I have another booklight with an LED light, but the area covered is not much bigger than a silver dollar, Ugh.) Highly recommend this one! Costs a little more, but it puts the first three I bought to shame.