The Mighty Bright Xtraflex2 Music Stand Light features 2 LED's rated for 100,000 hours providing 20 lumens of bright white light with 2 brightness settings. The XtraFlex2 has two precision engineered optical grade lenses which distribute light evenly. Powered by 3 AAA batteries (included) with a battery life of 30 hours. In addition, the XtraFlex2 is compatible with Mighty Bright AC adapters (sold separately).