condition mean min max 0 h after light 2.91776 2.28741 3.54811 4 h after light 2.49785 1.50368 3.49202 8 h after light 1.33301 1.31402 1.352 4 h after dark 2.46665 1.38234 3.55096 8 h after dark 0.6931345 0.659555 0.726714 12 h after dark 2.659125 2.57909 2.73916