I got this for my kindle to read in bed before I go to sleep.  It has two settings...bright and brighter.  It works great but it's not what I was looking for.  I had another that I could dial down the brightness but it's no longer being sold.  I gave it 4 starts because it's a good light and the adjustable arm works great...just know that if you want to read in the dark, the space shuttle will pick up on your location.