Wmicro Universal Portable 5V 150Lux/m Universal USB LED Light for outdoor travel hiking Lamp Camping Bright PC Computer Laptop Keyboard Multipurpose Power Dissipation: 0.5W, Quantity of Illumination: 150Lux/m, Color Temperature: 5000-6000K Illumination Angle: 80, Colour Rendering: 85%, Average Life: 30000 Hours Power Supply Mode: Universal USB DC5V 1A MAax. Input universal USB DC 5V 1A supply and drive the 0.5W white light LED to shine by the 15 limit current resistor. Can be powered from any USB port.