An arc lamp earns its place by putting light where a ceiling fitting cannot reach — over a sofa, over a dining table, over the corner you actually sit in. This one carries three heads on a single arc, and each head switches and dims on its own.
Aim one at the page, one at the wall and one up at the ceiling, and the same lamp covers reading light, accent light and general light. Every head rotates a full 360°, so you can re-aim them when the furniture moves.