REX Adjustable Dual Fluorescent Lamp.  Attaches to any surface that has an edge to fit the clamp opening of two and one forth inches, on any surface that is one half inch thick to two inches thick.  There is a convenient power outlet on the ballast.  Lamp includes two 12" fluorescent tubes, which eliminate "Over Shadowing".  Great tool for Architects, Painters, and Artists of all persuasions.