Mighty Bright 50810 Duet Music Light, Black Professional music stand light with double the brightness Lights more than two pages of sheet music Does NOT include AC adapter or input for external power. Uses Battery Power - 3 AAA Batteries Only Black colour Two XtraFlex arms with independent heads with super LEDs Each is 3-times brighter than a regular LED Use one light or two and because each head has a lense over the LED, the light spreads evenly with no hot spots There are no bulbs to ever replace and because it's and LED there is an extra long battery life