Lotus Light PRO14 Music Stand Light - Lithium Battery, Bag and Adaptor Uses a Rechargeable Lithium Polymer Battery (Built-In) to give 11hr Runtime (on low setting) | 6 hr Runtime on medium setting | 3.5 hr Runtime (on high). The 3 battery level indicator lights blink when you turn the light on. 14 High-quality CREE LEDs in a 13in Shade | 10in Flexible Arm Detachable Clip allows for compact stowing and other mounting options 1000 LUX (at center bottom of page). Warm & evenly-diffused light floods up to 4 pages. Includes neoprene travel bag and USB AC adaptor (9ft cord)