3 diopter, Optical quality glass, Stadium Lens 7.5 in. (19 cm) x 6 in. (15 cm).
Heavy duty spring-balanced arms, extend 42 in. (107 cm)
Uses 2 - 9W compact fluorescent bulbs (included).
Each bulb independently switched.
Includes industrial duty clamp-on bracket AA.
Metal arms and shade made of ABS plastic.