condition mean min max 0 h after light 0.0 0.0 0.0 4 h after light 0.148305 0.0 0.29661 8 h after light 0.1190535 0.0 0.238107 4 h after dark 0.1779775 0.0 0.355955 8 h after dark 0.0 0.0 0.0 12 h after dark 0.0 0.0 0.0