The lightning at the 99 British GP was the best in the history of the sport. Why isn't this Olympia standard today?? 
Not that I agree with it but a few arguments can be:
1.The lighting at the GP was too complimenting and hides flaws instead of exposing them, do remember that its still a contest and the competitors need to be ranked.
2.The Olympia is held at a much bigger hall and it might be technically harder to get that sort of lighting there.