condition mean min max 4 h after light 13.130541000000001 12.581529 13.679553 8 h after light 11.7359425 11.643083 11.828802 12 h after light 15.2584385 12.581529 17.935348 4 h after dark 11.5937145 10.700389 12.48704 8 h after dark 13.91649 12.701513 15.131467 12 h after dark 18.436826 18.436826 18.436826