V-LIGHT Architect Style CFL Swing-Arm Magnifier Task Lamp with Clamp-On Base (VS100512BC) 3-diopter glass magnifier lens enlarges by 175% and includes protective cover Adjustable clamp attaches to most work surfaces 31-1/2 inches tall with adjustable arm and shade On/off switch conveniently located on shade 13W Energy-saving CFL bulb included