This USB lamp perfectly meets my expectations. While the socket "ride" a little on some USB ports, but the LEDs are operating at full capacity, for a more than satisfactory lighting! It's almost too! Regarding the flexibility of the assembly, the maintenance is quite correct, and the selected position is easily established. We regret only one on / off button that would have been practical in some occasions.
In short, a very good price / quality ratio, this lamp can be used for multiple purposes: to drive the kids to illuminate the keyboard in a taxi or use of extra light (or night in a corridor! ). I recommend!