condition	mean	min	max
4 h after light	7.439333333333333	7.3309	7.5141800000000005
8 h after light	7.573943333333333	7.53062	7.6441300000000005
12 h after light	7.476	7.3476300000000005	7.67227
4 h after dark	7.703933333333334	7.3860600000000005	8.060780000000001
8 h after dark	7.6468	7.3792	7.88997
12 h after dark	7.39377	7.27418	7.45754