condition	mean	min	max
4 h after light	6.41697	6.26649	6.65618
8 h after light	6.316393333333333	6.122380000000001	6.50885
12 h after light	6.052973333333334	5.90699	6.2584800000000005
4 h after dark	6.49255	6.3916	6.609789999999999
8 h after dark	6.404543333333334	6.17328	6.67057
12 h after dark	6.44881	6.29699	6.53906