Ultra slim, ultra lightweight flexible table lamp with clamp. Has 28 high performance energy efficient daylight LEDs providing high light output over a large area. Flexible arm directs light, accurate color matching, touch switch dimmer with 4 settings. Lamp brightness 1.145 Lux at 12″. Clamp opens wide enough for evertite stretcher bars, clamp is all plastic and consequently very light weight. Touch switch is located on the outside tip of the bulb as shown in picture with grey circle. Runs only on electricity (not batteries).