condition mean min max 4 h after light 17.67729 17.633974 17.720606 8 h after light 16.570347 16.181018 16.959676 12 h after light 12.833698 12.668191 12.999205 4 h after dark 13.855671000000001 12.306402 15.40494 8 h after dark 14.5703195 13.735699 15.40494 12 h after dark 17.24701 17.24701 17.24701