One LED Light Source is a practical replacement light source that fits into various portable lights from Frandsen, including Pila, Ami and Grasp. Unlike traditional battery-powered lamps, where the entire device must be charged, with One you simply remove the light source from the lamp and then charge it with a USB cable. One is equipped with an energy-efficient LED light source and a built-in three-step dimming function. The One lamp is perfect if you always want to have a fully charged light source for your Ami, Pila or Grasp lamp. It is equipped with a battery that lasts up to 12 hours between charges.