Itinerant illumination. When it comes to task lighting, the mantra is the more adjustable the better. So we're not sure it gets any better than the Artemide Ipparco Table Lamp, where the diffuser is a bit nomadic. A seamless ring of LEDs encircle the interior of an aluminum ellipse, a magnetized point on the diffuser enabling it to be positioned anywhere on the fixture. Or, really, on any other metal point within reach of the cord, which happens to include an inline dimmer.