condition mean min max 4 h after light 29831.5 29831.5 29831.5 8 h after light 26406.25 25330.6 27481.9 12 h after light 23855.8 22340.6 25371.0 4 h after dark 30340.5 20803.1 39877.9 8 h after dark 29121.95 23506.1 34737.8 12 h after dark 26307.35 24223.8 28390.9