Enhanced illumination, plus focusability. 8,000 footcandles at 24″ and 3300°K color temperature. Focuses with central removable, autoclavable SterilHandle™ II. Friction knob allows user to position self-balancing arm without a tool. Uses three “optically improved” 50-watt halogen bulbs – each with 5,600 hour life. Floorstand includes footswitch, locking casters and cord wrap.