One LED Light Source f/Grasp series is a practical spare light source that fits all lamps in the Grasp lamp series from Frandsen. Unlike traditional battery-powered lights that require the entire unit to 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-stage dimming function.
The One light lightbulb is perfect if you always want to ensure a fully charged light source for your Grasp light and is equipped with a battery that lasts up to 12 hours between charges.
See all the lights that fit One here