Design OK- But that's all. The joints do not take from the first use and a faulty contact is created and the lamp goes out alone. a little stirring the bulb in it restarts, but not for long. It renews the manipulation and there it no longer wants. And that's a shame because the lamp emits a white light and pleasant to work reading or writing; Easy. I will disassemble to see if it is not possible to resolve the issue.