Verilux Kudo Natural Spectrum LED Adjustable Desk Lamp with USB Charging Port 36 energy efficient LEDs provide up to 5000K of bright light. 7 brightness settings via touch-sensitive light control bar. 4 adjustable positions, 145 degree swing range, lamp head twists 180 degrees. On-base 2.0 amp USB port. Natural Spectrum light improves visual acuity, color rendering and productivity.