Six energy efficient leds cast 28 lumens of bright white light adjustable neck holds the light securely in place powered by 3 aaa batteries included battery life 7 hours optional ac adaptor and cradle base sold separately lumens 28 durable leds last 100 000 hours no replacement necessary two brightness settings precisely engineered optical grade lens spreads light evenly sturdy clip grips almost anything base can be used free standing light easily folds for convenient storage lightweight