[JohnMitchel]

I think the most pertinent comparison to the potential situation this weekend is the 2009 Qatar MotoGP night race. The 125cc race was called after rain began due to the high visibility concerns like the glare off the track. The 250cc and MotoGP races were rescheduled to the monday.

This is much more relevant as unlike endurance racing the floodlights will cause so much more glare in the event of rain than headlights would. I am also assuming that enduro tyres do not pump out as much water as F1 tyres, but I may be mistaken. Certainly the possibility of endurance racing cars driving in another cars spray at night for at least 90 minutes is quite small compared to F1.

Also, unlike Circuit de la Sarthe, Marina Bay is flat as a tack and does not appear to have any areas that would naturally channel water away from the track, nor does it have any surfaces near the track which would soak up water. Standing water will probably be a big issue here - which also means glare from the foglights.

If it does rain this weekend there is a distinct possibility the race mightn't even start. Rescheduling it to monday is definitely not an option.