The Mighty Bright Xtraflex Super LED features a super bright LED with extra smooth and even illumination due to a special lens over the single super LED (light emitting diode) which is as bright as 3 regular LEDs. This music stand light is energy efficient, and powered by 3 AAA batteries (included). The LED bulb never needs replacing. The Extra Flex clips on to almost anything, from music to microphone stands and may be used as a handy freestanding task lamp as well.