6 energy efficient LEDs cast 28 lumens of bright white light.;Durable LEDs last 100 000 hours - no replacement necessary. Two brightness settings. Precisely engineered optical grade lens spreads light evenly. Sturdy bull-dog clip. Flexible gooseneck holds the light firmly in place. Light easily folds for convenient storage. Lightweight frame. Powered by 3 AAA batteries (included) or optional AC adapter (sold separately). Durable gig bag included. 12"L x 3"H x 1.75"W. Great for musicians DJs students readers choral groups hobbyists.