These lights are 50 feet apart just like the Centerline markings. Runway Centerline lights are Steady White and they are used for directional control of the aircraft during takeoff and landing. The lights within the last 2000 feet are also Bidirectional means they will be seen as steady white from other directions of the Runway. It is an indication that Runway end is approaching which is very useful information for a pilot for both takeoff and landing decision making. Runway Edge lights are steady White and but they become amber/yellow last 2000 feel of Runway. REILs flashes within 60 to 120 frequency per minute.

These strong White flashing lights indicate a positive identification of approach end of a particular Runway in an airport. Sometimes, Pilot will see White Strobe flashing lights places beside the Green Threshold lights and these lights are called Runway End Identifier Lights (REILs). On the other hand, a pilot landing Runway 27, will see the first set of GREEN lights (Threshold lights) and at the end of Runway will see a Set of RED lights indicating Runway End lights.

The reason why they are Bidirectional because a pilot landing on Runway 09 for example, will see a set of GREEN lights as Threshold lights and at the End of Runway will see a set of RED lights indicating the end of the Runway. These lights indicate the beginning of the runway and they are BIDERICTIONAL. These lights are also used by IFR pilots.ĭid you ever see a set of GREEN lights on each side of the runway? These lights are called Runway End/Threshold lights. Runway lights are used for low visibility operations associated with bad weather. Taxiway Stop bar light and Runway guard light - steady Red, flashing Yellow.Taxiway Lead on/off light – Alternating Green & Yellow.Taxiway Edge light – Omni directional Blue.These lights is extinguished or switched off before an aircraft can proceed on the Runway for Takeoff operation. Red Stop bar lights on means active traffic on the runway or an aircraft is landing imminently. Remember Red means STOP- whenever you see RED, don’t even think about moving, you need clearance. These lights can be switched on and off automatically. Red Stop bar lights are steady unidirectional Red lights in the taxiway. Runway Guard lights/ Clearance Bar lights Pilots need clearance to cross Runway guard lights and must use caution for intercepting other aircraft. They are flashing yellow lights for low visibility conditions. Yellow/Amber Hold short lights are called Runway guard lights. These lights are alternating Green and Yellow. Taxiway LEAD ON lights is the lights that lead the aircraft to the runway. These lights are installed in busy airports. The Centerline lights are very bright Green, you can see them even in worse weather in low visibility. Taxiway edge lights are always steady blue and also called Omnidirectional.

Alternating red and white runway lights