condition	mean	min	max
4 h after light	18.85735	15.8323	21.8824
8 h after light	19.2462	17.8084	20.684
12 h after light	18.74315	17.1419	20.3444
4 h after dark	41.4364	32.7987	50.0741
8 h after dark	23.83145	17.2345	30.4284
12 h after dark	19.3684	17.1181	21.6187