Switch-over time (light)

urn:aero:airm:1.0.0:ContextualModel:ATMBusinessTerms:Switch-over_time_(light)

The time required for the actual intensity of a light measured in a given direction to fall from 50 per cent and recover to 50 per cent during a power supply changeover, when the light is being operated at intensities of 25 per cent or above.

Source: ICAO