Ushoppingcart Durable Flexible gooseneck Bright 9 Led Orchestra Lights Clip-on Adjustable Music Stand Light,Hammerhead LED Book Light Lamp With Adapter Great for music stands - pianos, orchestra pits, work tables, mixing tables, dark clubs and more Great for reading - iPad, Kindle, tablets and regular books.Light weight high quality material Adjustable brightness: The smart switch on the bottom of the base can be used to adjust the brightness.switch once the lights will reach its half brightness,twice full brightness,and the third time the power will be cut off. Rechargeable:There is a jack for power supply on the bottom of the base.It can be used to connect the USB,then the DC transformer can supply the lights with electricity. LED Music Stand Light Clip on Light Book Reading Light Desktop Light