Identifying aircraft at night: position, anti-collision, landing and logo lights

By day, you recognize a jet by its nose, engines and wingtips. After sunset, little of that remains: a few colored dots, a glaring flash, two headlights on approach. If you want to identify aircraft at night, you have to learn to read these lights. That sounds like a guessing game but follows fixed rules – colors, positions and switching sequences are set internationally. This guide shows you which lights a commercial aircraft carries, what they reveal about direction and flight phase and which details let you recognize even the manufacturer and airline at night.

The short answer

At night, you read an aircraft in three steps. The position lights (red left, green right, white rear) show you which direction it is flying. The anti-collision lights – red beacon and white strobes – reveal whether the engines are running and whether the aircraft is already on the runway. The working lights such as landing lights, taxi light and logo light show the flight phase and, at best, make the tail with the airline livery visible. For the exact type, you combine this with the flash pattern, the sound and live data.

The lights at a glance

A modern commercial aircraft carries considerably more lights than you might think at first glance. Some are mandatory, others are working lights for crew and ground staff. The most important:

Light	Color	Position	When on	What it tells you
Left position light	red, steady	left wingtip	always at night, often by day too	left side of the aircraft
Right position light	green, steady	right wingtip	always at night, often by day too	right side of the aircraft
Tail light	white, steady	tail or rear wingtips	together with the position lights	aircraft is flying away from you
Beacon	red, flashing	top and bottom of the fuselage	before engine start until shutdown	engines are running or about to start
Strobes	white, flashing	wingtips, often also the tail	from lining up on the runway until leaving it	aircraft is on the runway or in the air
Landing lights	white, very bright	wing root, underside of the wing or nose gear	takeoff, landing, lower altitudes	takeoff or landing phase
Taxi and runway turnoff lights	white	usually on the nose gear, sometimes the wing root	when taxiing and turning	aircraft is moving on the ground
Logo light	white	usually in the horizontal stabilizer, aimed at the vertical stabilizer	optional, often at night	airline livery visible
Inspection light	white	side of the fuselage ahead of the wing	as needed	crew checks wing and engine

The exact arrangement differs by type and year of manufacture. Newer types such as the Boeing 787 and many retrofitted aircraft increasingly rely on LED technology, which often makes the light pattern look somewhat colder and sharper than with older halogen lamps and flash tubes. Large four-engine jets such as the Boeing 747-8, on the other hand, you recognize at night more by the enormous span between the position lights.

Position lights: red, green, white

The position lights – often also called navigation lights – are the backbone of the nighttime light pattern. Anyone who has ever seen a ship at night knows the principle: red sits on the left, green on the right, white shines to the rear. The US design rules for large commercial aircraft set fixed sectors for this. The red and the green light each cover 110 degrees, measured from the direction of flight to the left and right respectively. The white tail light fills the remaining 140 degrees to the rear. Together that makes a full circle without overlap.

For you on the ground, that means: from every angle, you see an unambiguous combination.

• Red and green at the same time: The aircraft is coming toward you. Red appears on your right side because you see the left wing from the front.
• Green only: The aircraft is passing you from left to right – you are looking at its right side.
• Red only: It is flying from right to left.
• White only, steady: It is moving away from you.

The distance between the red and the green light is practically the wingspan. If the two points are far apart on an approaching jet while the landing lights still look small, you are dealing with a widebody aircraft. A compact light group speaks more for a narrowbody jet or a regional aircraft. With a little practice, you can estimate the size class this way before you even make out contours.

Anti-collision lights: beacon and strobes

The second group is meant to make the aircraft visible to others. It consists of two types of light that together form the anti-collision light system but are usually switched separately in the cockpit.

The red beacon

The beacon is a red flashing light on top of the fuselage, usually supplemented on commercial aircraft by a second one on the underside. Older aircraft had rotating all-round lights for this, while today most flash electronically. The beacon comes on before the engines are started and stays on until they have stopped. On the apron, that makes it the clearest signal of all: if red flashes at the gate, pushback is imminent or the engines are already running.

The white strobes

The strobes are the glaring white flashers on the wingtips, on many types also at the tail. They are usually switched on only when lining up on the runway because they would blind people on the ground. After landing, they go off again when leaving the runway. So if white flashes suddenly appear at the holding point, the takeoff clearance is in or imminent – time to pick up the camera.

The US design rule requires a flash rate between 40 and 100 cycles per minute for anti-collision lights and allows only aviation red or aviation white for this. On many types, beacon and strobes are timed to match each other – and exactly this rhythm differs by manufacturer.

The flash pattern as a manufacturer clue

This is where it gets exciting for spotters: the strobes do not flash the same way at all manufacturers. Many Airbus types – from the A300-600 and A310 through the A320 family to the A330, A340 and A380 – flash twice in quick succession. Boeing aircraft such as the 737 usually flash once. In the night sky, this double flash is one of the few clues you can pick up without binoculars and without data.

But don’t rely on it blindly. Retrofits, special versions and other manufacturers such as Embraer, Bombardier or ATR have their own patterns. The flash pattern is an indication, not proof – you confirm the type via flight tracking or the registration.

Landing lights, taxi light and runway turnoff lights

The brightest lights on the aircraft are the landing lights. They shine forward and down so that the crew can see the runway, and at the same time make the aircraft conspicuous from far away. On final approach, you often recognize them as a bright point on the horizon long before contours appear. In the US, the aviation authority FAA recommends switching them on below 10,000 feet and within about ten miles of an airport. In cruise flight, they are usually off.

Where the lights sit differs by type. On the A320 family, the landing lights extend from the underside of the wing, while on the Boeing 737 they sit mainly in the wing root. Many types also carry lights on the nose gear. For you at the fence, that results in different light patterns: sometimes two widely spaced points, sometimes a tight group close to the fuselage, sometimes an additional light lower under the nose.

On the ground, more working lights are added:

• Taxi light: usually sits on the nose gear and illuminates the taxiway ahead of the aircraft.
• Runway turnoff lights: shine diagonally to the side and help when turning off the runway onto the taxiway. Depending on the type, they sit on the nose gear or in the wing root.
• Takeoff light: Some types have a separate light on the nose gear that is switched on for takeoff.

This results in a typical sequence. When taxiing, taxi light and runway turnoff lights are on, and on the runway, landing lights and strobes join in. After landing, the whole thing runs in reverse: strobes and landing lights off, taxi light on. How the lighting of runway and taxiways fits in is explained in the article Runway and taxiway lighting.

Logo lights: the airline in the spotlight

Logo lights are perhaps the most valuable light for night spotters. They usually sit in the top of the horizontal stabilizer and illuminate the vertical stabilizer. They are not mandatory, but many crews switch them on at night to make the aircraft more conspicuous – and because an illuminated tail fin is advertising for the airline on the side.

For you, that means: even when the fuselage disappears in the dark, you can often read the airline from the illuminated tail. A yellow tail over the apron at Leipzig/Halle, for example, immediately tells you a freighter from the DHL network, such as one from European Air Transport Leipzig. Striking tail designs are thus easier to assign at night than inconspicuous white tails. If you are specifically looking for special liveries, you will find fitting strategies in the guide Finding special liveries.

Inspection lights

Less well known are the inspection lights on the side of the fuselage ahead of the wing. They illuminate the wing leading edge and the engine so that the crew can, for example, check for ice buildup. Occasionally they are also on during boarding. For you, they are a nice bonus: with the inspection light on, you see the engine nacelle and wing much better – and can assign engines or winglets and sharklets at night too.

What the lights reveal about the flight phase

Because the lights are switched in fixed sequences, you can read from the light pattern what the aircraft is doing at the moment. The details differ by airline and procedure, but the basic logic is almost the same everywhere.

This sequence also helps with photography. When waiting at the runway is worthwhile, you often see at night from the lights earlier than from the aircraft itself. Tips on exposure, ISO and tripod are in the guide Photographing aircraft at night.

Identifying the type at night: how to proceed

Determining the exact type at night is the supreme discipline. With a fixed order, though, you get surprisingly far.

After the light pattern, further clues come in:

• Wingspan: The distance between red and green lights reliably separates narrowbody and widebody.
• Sound: Engines sound very different depending on the type – how to train your ear is covered in Identifying aircraft types by sound.
• Landing gear: In the light of its own landing lights and the runway lighting, the extended landing gear is often visible. The logic behind it is explained in Landing gear as an identifying feature.
• Live data: If you work with flight tracking, you match the light pattern with the flight on the map. How that works is shown in Flight tracking with ADS-B for spotters.

You still need the daytime features from Identifying aircraft types for beginners: as soon as an aircraft taxis under the apron floodlights or stands in the logo light, nose, tail and engines take over again.

Where you see the most at night

At many German airports, little happens at night because night flight restrictions limit traffic. Which rules apply where is summarized in the overview Night flight bans at German airports. That is why cargo hubs, where night operations are part of the business model, are especially interesting.

Leipzig/Halle Airport is the best-known candidate: as DHL’s European hub, it has a great deal of cargo traffic at night. At Cologne Bonn Airport, too, a lot of cargo is handled at night. Whether the observation decks in Leipzig/Halle and Cologne Bonn are open in the evening, you check beforehand in the respective spot profiles and on the airport websites – for night sessions, you often have to move to publicly accessible places outside the grounds. Which freighters typically operate there is explained in Recognizing freighters.

What to watch out for

• Lights are clues, not proof. Colors and positions are strictly regulated, while flash patterns and light arrangement vary by year of manufacture, retrofit and manufacturer.
• Switching sequences are up to the airline. Whether the logo light or taxi light is on is also decided by the airline’s procedure. A dark tail does not mean there is no logo light.
• Don’t get blinded. Landing lights on final approach are extremely bright. Don’t look straight into them for minutes if you have adapted your eyes to the dark.
• Helicopters and military aircraft are chapters of their own. Helicopters carry a similar but separate light pattern; more in Identifying helicopter types.
• Note what you saw. Time, direction, light pattern – that lets you match the sighting later via flight tracking.

Conclusion

At night, an aircraft is no riddle but a light signal with a clear grammar. The position lights show the direction, beacon and strobes the operating phase, landing lights and taxi light the way across the airport. With flash pattern, wingspan, sound and an illuminated tail, you often get as far as the manufacturer or airline. The last step to the exact type comes from flight tracking and the registration.