condition	mean	min	max
4 h after light	7.144803333333334	7.01523	7.29853
8 h after light	7.14955	7.019939999999999	7.2578
12 h after light	7.01898	6.4911	7.319
4 h after dark	7.290719999999999	7.212789999999999	7.354139999999999
8 h after dark	7.081653333333333	6.772639999999999	7.34505
12 h after dark	7.08405	6.96662	7.18355