Bought from Amazon originally, used for the past two years, works great. Lights up your desk! Rotates at three pin joints along arm, has two brightness settings.

I think it's this:
http://www.amazon.com/Living-Accents-Halogen-Architect-Adjustable/dp/B0044FZ5SE/ref=sr_1_1?ie=UTF8&qid=1371167523&sr=8-1&keywords=HALOGEN+DESK+LAMP