condition mean min max 4 h after light 6.184356666666667 6.03262 6.26714 8 h after light 5.939666666666667 5.87441 6.04355 12 h after light 5.96583 5.78912 6.2472900000000005 4 h after dark 6.211556666666667 6.06393 6.33397 8 h after dark 6.42973 6.23508 6.62839 12 h after dark 6.5261 6.417669999999999 6.657489999999999