condition mean min max 4 h after light 5.767686666666666 5.67817 5.86038 8 h after light 5.73703 5.67924 5.82455 12 h after light 5.90063 5.6220099999999995 6.08609 4 h after dark 5.89337 5.50964 6.38504 8 h after dark 5.866463333333333 5.56416 6.2114199999999995 12 h after dark 5.908943333333333 5.86336 5.96943