I capped some onboards from the ACO onboard channels during the race and this I got the right time:
https://www.youtube.com/watch?v=QVc7tQfeMlc
20+ minute segment from the race when Mardenborough was leading, and started lapping fast, setting fastest lap at least twice. Imho, just very rare to see onboard (from this angle) during the race when a driver is really pushing. Also happens to be just when it visibly turns to dark.
ps. Mandatory rant: why can't they use this angle for P1 cars too.