condition	mean	min	max
4 h after light	6.676753333333333	6.59054	6.84065
8 h after light	6.64818	6.45792	6.911969999999999
12 h after light	6.56282	6.15768	6.780480000000001
4 h after dark	6.826176666666667	6.6251	6.99297
8 h after dark	6.869086666666666	6.5399	7.12034
12 h after dark	6.90357	6.72738	7.05847