Underled

Underled is a term that refers to a type of LED (Light Emitting Diode) that is not directly connected to a power source. Instead, it is powered indirectly through a secondary circuit or component. This can include configurations where the LED is driven by a secondary power source, such as a battery or a capacitor, which is charged by the primary power source. Underleds are often used in applications where the primary power source is not suitable for direct LED operation, such as in low-power or battery-operated devices. They can also be used to create specific lighting effects or to extend the lifespan of the primary power source by reducing the current draw on the main circuit. The term "underled" is not universally recognized and may vary in usage depending on the context and the specific application.