Efficient LED Lighting: a powerful and efficient 5W LED provides 500 Lumens of light at 3500 K for a lifetime usage of 40,000 hours. Adjustable lighting: With a tactile dimmer switch located on the base for easy access, this lamp is able to switch between 4 different lighting intensities to adjust for varied activities and lighting needs, whilst using the Edge LED technology, providing little glare and better visual comfort. Double Articulated: Two points of movement allow to tilt the head and arm independently, offering improved customisation to suit needs. Material: aluminium.