"Whether you need to get that crucial piece of fine-tuning just right, or an adjustable task light that will stay put, this handy Klutch 7 1/2in. Magnifying Light is just the thing. Bulbs qty. 1, Watts 28, Volts 120, Bulb Type Fluorescent. Steel swing arm design and articulated head with 7 1/2in.L x 6 3/16in.W glass lens Securely clamps to desks or work tables 3D diopter CUL listed CETL approved"