Premium Bottle Lights. Brightest Wine Cork USB Light - 12 Lumens, Special for Wine Bar and Party (3 packs) Brightest wine bottle light on market 12 lumens & 18,000 MCD the experts at spark LED have delivered something up to 50% brighter than competitors Powered by standard USB port, such as computer, powerbank Rechargeable light for your empty bottles Charging time: 1 hour; Running time: up to 3 hours Fits for most standard wine bottle (Diameter : 0.39'' - 0.94'')