condition mean min max 0 h after light 0.0 0.0 0.0 4 h after light 0.0 0.0 0.0 8 h after light 0.0 0.0 0.0 4 h after dark 0.0370425 0.0 0.074085 8 h after dark 0.0 0.0 0.0 12 h after dark 0.0 0.0 0.0