My husband has gone through many book lights.  This was one of his first, until the kids disassembled it, and after quite a few book light failures after, we ordered another of these, and it is still of high quality.  It has a great neck, a strong clip, bright lights that don't fade or blink, multiple brightnesses (two bulbs, three lighting choices), and was a decent price for one that we expect to last a while.  Coming from someone who has bought many book lights, I would recommend the Mighty Bright lights over less-expensive lights- in this case, you really do get what you pay for.  Cheaper varieties left me disappointed.