SumDirect Clip-on Installable Batteries LED Music Stand Light with Adapter 9 bright LED with 100,000 hours life time. Soft natural white light and flexible gooseneck allows for precise light adjustment. Sturdy clip attaches to music stand or sits freestanding, shade on back of lamp head directs more light on music and reduces glare towards audience.Easy access power switch on bottom controls two brightness levels. Powered by free AC adapter or free come with 78" USB power cord Best warranty: Lifetime warranty on light, adapter 1 year