condition	mean	min	max
4 h after light	7.49427	6.95846	8.03008
8 h after light	6.00861	5.83196	6.18526
12 h after light	6.325305	5.86946	6.78115
4 h after dark	8.53724	7.99692	9.15533
8 h after dark	8.34652	8.07046	8.59984
12 h after dark	7.41517	6.91853	7.80124