After trying for three hours to assemble this lamp, I gave up. The threads in the pole that connects to the lamp arm were poorly machined, so it was impossible for the arm to be inserted onto the pole properly. On top of that, the small lever that holds the arm in place when the lamp is finally assembled fell off, because it was too big for the part of the arm it is supposed to attach to. So the lamp was unusable. The only good thing about this purchase was that I got a full refund. It is not a well-made lamp.