condition mean min max 4 h after light 3.121555 3.09876 3.14435 8 h after light 3.0077350000000003 2.99813 3.01734 12 h after light 2.748665 2.47063 3.0267 4 h after dark 4.35691 3.92236 4.79146 8 h after dark 3.5905 3.56539 3.61561 12 h after dark 3.6005000000000003 3.35876 3.84224