Plain English Meaning

Newer types of aircraft lights — mostly LEDs — that have replaced the old-style bulbs. They last longer, use less power, and shine brighter.

Full Definition

A general term used in the Pilot's Handbook of Aeronautical Knowledge to describe modern aircraft lighting systems that have replaced or are replacing traditional incandescent bulbs, primarily LED (light-emitting diode) and HID (high-intensity discharge) lights. These systems are used for position lights, anti-collision lights, landing lights, taxi lights, and cockpit/instrument lighting, and they offer longer service life, lower power consumption, greater brightness, and improved compared with older -based lamps.