condition	mean	min	max
4 h after light	7.195636666666666	6.983230000000001	7.3067899999999995
8 h after light	6.99331	6.706169999999999	7.20193
12 h after light	6.983093333333334	6.6002600000000005	7.213030000000001
4 h after dark	7.2368733333333335	7.0812100000000004	7.42789
8 h after dark	7.0749666666666675	6.845560000000001	7.285010000000001
12 h after dark	7.213703333333334	7.19412	7.22768