condition mean min max 4 h after light 1.2928465 0.771493 1.8142 8 h after light 2.3154250000000003 2.09981 2.53104 12 h after light 2.344645 2.30808 2.38121 4 h after dark 2.03195 2.01737 2.04653 8 h after dark 1.787375 1.34795 2.2268 12 h after dark 1.815785 1.7694 1.86217