For example, when an aircraft pilot needs help identifying the airport runway, the illumination level needs to be high. But as the aircraft approaches the airport, the pilot may ask air traffic control to lower illumination to a more comfortable level for final approach and landing. When airports don’t have a control tower, or if an air traffic controller isn’t available, the pilot accomplishes the on-off and brightness control of airport lighting systems through the air-to-ground radio.
Class 1 light: 2.8A; 2.7-2.9A; Class 2 light: 3..4A; 3.3-3.5A; Class 3 light: 4.1A; 4.0-4.2A;
Class 4 light: 5.2A; 5.1-5.3A; Class 5 light: 6.6A; 6.5-6.7A. Domestic civil aviation navigation lights are controlled by a 5-level constant current dimmer and connected in series with a constant current. The voltage across the source of the luminaire is determined by the power of the source.
The current is divided into 5 levels:
Level 1: 2.8A; Level 2: 3.4A; Level 3: 4.1A; Level 4: 5.2A; Level 5: 6.6A.
Note: These current values are RMS currents.
See, FAA Information Circular AC150/5345-10F.
Since the current is fixed, the voltage is determined by the bulb used.
Such as the airport commonly used 50W, 100W, 200W, 45W, 105W; according to the current can calculate the voltage at different light intensity (current) level.
Second, the illumination value for the safety of the apron should not be lower than 101x, and auxiliary lighting can be added if necessary.
Third, apron lighting should take the following measures to limit the glare generated by aviation pilots, airports and apron managers during flight and taxiing:
I Avoid direct light from the luminaire from illuminating the tower and landing aircraft;
2 The installation height of the luminaire should not be less than that of the pilot who regularly uses the aircraft.
The maximum eye height (eye wheel height) is twice.
Fourth, the arrangement and orientation of the luminaires should be such that each position can receive light from two or more directions.