"This Arturo is a 5kW dual power softlight with four lamps, switched in pairs, to give intensity control with constant colour temperature. Designed for 4 x 189mm linear tungsten halogen lamps of 1250W, 1000W or 625W. A four position rotary switch allows lamp switching between one pair, two pairs, or off. The pole-operated version includes geared control of pan and tilt with friction clutches to allow override. Optional eggcrate accessories may be fitted for directional control of beam spread." - Theatrecrafts.com