Yes its a twilight race. However the lights they use on track are pretty impressive. To give you a guide to the ambient light levels during the race. last year I was using 1/400 f5.6 at ISO 1250 for a fairly stock shot. I'd also recommend using spot metering will save you having to chimp to get the exposure right.
Its one of my fave races of the year just because of how many light changes and the different ways you can work with the light. You can view a small selection of my images here
Abu Dhabi F1 picture post .