condition	mean	min	max
4 h after light	6.92466	6.8080300000000005	7.139139999999999
8 h after light	6.921340000000001	6.78366	7.020580000000001
12 h after light	7.7087933333333325	7.550269999999999	7.8269899999999994
4 h after dark	8.04744	7.84633	8.30546
8 h after dark	8.019243333333334	7.94378	8.11788
12 h after dark	7.821666666666666	7.685789999999999	7.975439999999999