Adjustable Swing Arm: Features a spring-balanced, double-braced arm that allows flexible height and angle adjustments.Rotatable Lamp Head: The bell-shaped metal shade can be rotated to focus light precisely where needed.Weighted Base: Equipped with a circular, heavy desktop base for structural stability. Many variants also include an interchangeable C-clamp for edge-of-desk mounting.Bulb Compatibility: Typically uses a standard E26 or E27 screw-base holder, compatible with LED, CFL, or incandescent bulbs.