condition	mean	min	max
4 h after light	13.11375	10.698	15.5295
8 h after light	17.61305	16.7676	18.4585
12 h after light	19.84265	18.6231	21.0622
4 h after dark	30.8136	29.4708	32.1564
8 h after dark	27.1356	25.8451	28.4261
12 h after dark	21.4292	20.7951	22.0633