condition	mean	min	max
0 h after light	20.0691	18.8895	21.2487
4 h after light	17.9628	16.4203	19.5053
8 h after light	17.88645	16.0763	19.6966
4 h after dark	18.27655	16.3567	20.1964
8 h after dark	19.546	19.1074	19.9846
12 h after dark	19.15215	18.3268	19.9775