How many lights are placed at taxiway intersections?

At taxiway intersections, there are typically two blue lights installed. These lights serve as visual aids to help pilots and aircrew identify the taxiways and their intersections at night or during low visibility conditions. The placement of two blue lights at these intersections is specifically designed to provide an effective means of guidance, ensuring safety while navigating the airside of the airport. The blue color of the lights is standard practice in aviation as it is easily distinguishable against other types of airport lighting, helping to prevent confusion with other signals. This is why the correct answer identifies two blue lights as the standard setup at taxiway intersections.