Originally Posted by MDork

no hes still guessing.

oh boy...here we go. sorry sean but youre wrong again.

the lights on the side of the car were used in all ALMS races including this year's laguna race. the 3 LED's are different colors based on class and light up to show position (1 light is first, two is second, three is third). as HYBRID said, the lights are on the rear quarter, just in front of the rear wheel.

for your reference:

"Different colored lights are used to differentiate the four classes. LMP 900 cars are equipped with RED lights. LMP 675 cars have BLUE lights. GTS car lights are GREEN and GT car lights are YELLOW."