To help fans follow class running order at each track, the American Le Mans Series introduced a revolutionary and state-of-the-art Leader Light System in 2002. It allows spectators to easily identify the top three cars in each class.The positions of the cars are signaled by the number of LED lights lit on the side of the car.1 Light — Leader2 Lights — 2nd place3 Lights — 3rd place The Leader Light System uses color to identify which class the cars are competing in (each color represents a particular class):Red Light – LMP1Blue Light – LMP2Green Light — GT*
The Challenge entries (while not utilizing the Leader Light System) feature a green light at the rear of the cars. LMP Challenge cars have a purple number and class decal. GT Challenge cars have an orange number and class decal.• At Sebring, FIA World Endurance Championship GT entries are divided into two groups. GTE Pro cars will use green Leader Lights. GTE Am cars will use yellow Leader Lights.