condition	mean	min	max
4 h after light	6.690793333333333	6.53025	6.82804
8 h after light	6.12756	5.84056	6.384119999999999
12 h after light	6.39757	6.18253	6.52104
4 h after dark	6.699036666666666	6.61568	6.8322899999999995
8 h after dark	6.712083333333333	6.64567	6.83533
12 h after dark	7.587956666666667	7.4992399999999995	7.6527