The Artemide Tizio 35 is a great fit for a small desk space. It is smaller than its Tizio Classic brother, so it doesn't appear overwhelming. Since it does only take a 35W halogen lamp it is important that you check if this will be sufficient for you. For my own small desk it is not an issue, especially since I primarily work on my laptop. Designed by Richard Sapper in 1972, the Tizio has gained iconic status and is considered a design classic.
The Tizio 35 is here shown in the raw finish, which is unfortunately no longer available. But the black model is definitely classic and beautiful.