Flexible 9 LEDs Clip-On Music LED Lamp Light for Orchestra Music Piano Stand 1. Nine light emitting diodes( LEDs) illuminate up to four pages of sheet music. 2. Rugged, solid state lighting technology lasts up to 100,000hours 3. 24 hours of battery life for continuous using on the low setting or 16 hours on the high setting (Low and High) 4. Easy access power switch on bottom controls two brightness levels 5. Strong and flexible gooseneck arm that moves in as many as directions as needed