Handcrafted USB-powered nightlights out of seashells and found objects.. Most items shown are mounted on 1.5-3cm thick stone bases. Unless otherwise indicated, the shells are 2 to 6 inches high. All Lightslivers are powered by USB ports or any extra cell phone charger. All new products have a touch button dimmer to set a comfortable light level. Lightslivers are intended to be plugged in at all times with a low light level “sentinal” feature to hold back the dark.