condition mean min max 4 h after light 8.607615500000001 7.921756 9.293475 8 h after light 8.2585235 7.409674 9.107373 12 h after light 9.8708365 9.841601 9.900072 4 h after dark 9.309821 9.276873 9.342769 8 h after dark 9.903439500000001 9.060071 10.746808 12 h after dark 8.449436 8.449436 8.449436