condition	mean	min	max
4 h after light	14.576	13.6412	15.5108
8 h after light	7.237375	6.86222	7.61253
12 h after light	7.158625000000001	6.62971	7.68754
4 h after dark	7.695813333333333	6.75948	8.24411
8 h after dark	11.8916	11.1014	12.6513
12 h after dark	12.292200000000001	11.4214	13.2321