With these Light my Bricks USB power cables, you can power your Light Kit using a USB power bank. The connection cable is 30 cm long. These can also be used to connect multiple lighting kits through a single USB cable. Light my Bricks offers LEGO fans an easy way to enhance their LEGO models with LED lights. All components in the Light my Bricks sets are plug-and-play compatible – no electronics knowledge is required for installation. Light my Bricks parts are small and delicate enough to fit between and under LEGO bricks.