condition	mean	min	max
4 h after light	9.07884	8.49117	9.66651
8 h after light	9.19581	9.18308	9.20854
12 h after light	16.9231	15.51	18.3362
4 h after dark	21.052633333333333	21.0449	21.0665
8 h after dark	14.4299	13.675	15.0941
12 h after dark	12.432133333333333	11.877	12.9468