Definition
A NOTAM and chart contraction used to refer to a light or to lighting equipment, most commonly airport lighting systems such as runway, taxiway, approach, or obstruction lights.
Plain English
LGT is shorthand for the word light or the word lighting. When you see it in a NOTAM or on a chart, it is talking about an actual light or a lighting system at or near an airport.
Context Anchor
Seen in airport information, charts, and FAA notices when a light or lighting system is available, changed, limited, or out of service.
Derivation
LGT is a shortened written form of light or lighting, made by keeping the main consonant sounds. This makes it quick to read in space-limited aviation text.
Why Pilots Care
Knowing the status of lights is essential for safe night operations, taxiing, and landing at unfamiliar airports.
Intuition Check
Do not read LGT as a general comment that something is bright or not heavy. In this context, it means an actual aviation light or lighting system.
Example Sentence 1
The NOTAM read RWY 27 LGT U/S, meaning the runway 27 lights were unserviceable.
Example Sentence 2
Pilots confirmed the LGT was operational before the night flight.