Dual Head Clip-on Music Stand Light-AC Adapter and USB Cable Included-8-LED for Book Reading by Bravodeal Four energy-efficient LEDs per gooseneck cast bright white light Durable LEDs last 100,000 hours - no replacement necessary-ecofriendly Two switches control up to four lighting levels 3 POWER OPTIONS: HANDY 72inch LONG USB CORD INCLUDED! Power your music stand light by AAA batteries, USB, or electrical outlet Precisely engineered optical grade lens spreads light evenly,Sturdy padded clip firmly grips music stands