YOUKOYI A16 LED Desk Lamp, Swing Arm Architect Lamp, Drafting Table Lamp Clamp, Can be Power by USB, Eye-caring, 3 Level Dimmer, White Adjustable Swing Arm Lamp - The lamp head can be adjusted 180up and down, and 350right and left. 13.7+13.7" extendable long arm to folded to 15.7" 3-level Brightness Dimmable - Low light (17LM/0.17W), middle light (170LM/1.7W),high light(340LM/3.4W).Satisfy your different lighting needs. Clip-on Clamp Lamp, Easy to Install- The strong metal clamp can support up to 2"/5cm(max) thick desk.Space saving, suitable for reading,office,art workshop,architect,etc. Professional Eye Protection - Adopting diffusion translucent material, close to daylight illumination, emitting soft light without ghost, glare or flicker. Come with a USB charging cable, can be powered by computer and power bank, can be used outdoor.