condition mean min max 4 h after light 7.5505390000000006 7.389766 7.711312 8 h after light 8.072837 7.389766 8.755908 12 h after light 7.995882 6.651328 9.340436 4 h after dark 7.5621285 7.215464 7.908793 8 h after dark 7.0977440000000005 6.805722 7.389766 12 h after dark 7.797316 7.797316 7.797316