condition mean min max 4 h after light 2.1 2.1 2.1 8 h after light 19.75 13.9 25.6 12 h after light 8.600000000000001 7.9 9.3 4 h after dark 13.65 2.1 25.2 8 h after dark 4.1 2.2 6.0 12 h after dark 18.200000000000003 8.8 27.6