condition mean min max 4 h after light 4.50395 4.39337 4.6551599999999995 8 h after light 4.50485 4.4288099999999995 4.56059 12 h after light 4.48174 4.3684 4.63127 4 h after dark 4.429763333333333 4.38005 4.48958 8 h after dark 4.456580000000001 4.39222 4.53544 12 h after dark 4.469023333333333 4.38985 4.52717