CoolSpot II is the aesthetically appealing. CoolSpot II instant incredibly pure, white light along with a guaranteed no drift arm, high intensity setting and variable spot size control. The CoolSpot II instant intensity of up to 60,000 lux at 1 meter. Important Functions Friction Knob: Friction knob permit user to alter friction on the self balancing arm positioning to desired tension without a tool. Halogen Bulb: 150 watt halogen bulb adds 600 hour average bulb life on standard setting. SteriHandle Design: SteriHandle design permit removal or replacement of SteriHandle with one hand . Removable Autoclavable: Removable, autoclavable center. SteriHandle: SteriHandle for positioning. Handle: New, improved and easy to clean housing design with convenient. Variable Spot Size: Variable spot size of 2? 10? . Variable Intensity: CRI (Color Rendering Index) of 94 Bi level dimmer for variable intensity. Temperature: Features Up to 60,000 lux at 1 meter 4300 K color temperature.