OttLite CY4G59-FFP Led Desk Lamp with Color Changing Tunnel & 5V, 2.1A Usb Port, 11.75" x 9.5" x 2.75", BLACK 4 brightness settings with maximum of 500 lumens 3 color temperatures 5V, 2.1a USB port fully charges smartphones and tables Super bright natural daylight leds rated to last up to 40,000 hours Tunnel base glows in color of your choice or cycles through spectrum