condition mean min max 4 h after light 2.304515 2.28508 2.32395 8 h after light 2.023195 1.95911 2.08728 12 h after light 2.15407 2.0597 2.24844 4 h after dark 2.46794 2.17588 2.68551 8 h after dark 2.1133566666666668 2.08545 2.12867 12 h after dark 1.73936 1.20385 2.34563