condition mean min max 4 h after light 1.708465 1.49597 1.92096 8 h after light 1.649995 1.39027 1.90972 12 h after light 2.08485 1.90576 2.26394 4 h after dark 2.2217000000000002 2.04601 2.39739 8 h after dark 2.10852 1.85238 2.36466 12 h after dark 2.16576 1.92843 2.40309