condition mean min max 4 h after light 5.05762 4.40607 5.70917 8 h after light 5.494255 5.43783 5.55068 12 h after light 7.579525 7.12436 8.03469 4 h after dark 7.9636700000000005 6.95711 8.97023 8 h after dark 8.04685 7.9182 8.1755 12 h after dark 8.187145000000001 8.14733 8.22696