A. Single lighthead and Pivot Arm, Single Point Suspension (Type A): Shall be a surgical light system of the single point suspension type with a single lighthead unit, mounted from a pivotal arm assembly. lighthead shall rotate within a clearance circle of 3624 mm (142.67 inches) to 6544 mm (257.63 inches), depending on lighthead site horizontal arm selection. Center of lighthead adjusted vertically from 1190 mm (46.85 inches) to 2250 mm (88.58 inches) above the floor. And the surgical light is a kind of the buy dental supplies which often are used with dental shadowless lamps.