Quote:
Spectators will know in real time the classification of each car during the race. All GT3 will be equipped Lumirank system that we saw last year at the City Challenge. Since last fall, Lumirank has upgraded the system with a new LED array. Lumirank will also be present at the Nurburgring for the Blancpain Endurance Series race.
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This from EI
I think it looks pretty cool and will really help spectators and tv
http://www.lumirank.de/