condition	mean	min	max
0 h after light	18.83115	18.42	19.2423
4 h after light	13.4176	12.9473	13.8879
8 h after light	13.0384	12.4334	13.6434
4 h after dark	16.43375	14.6081	18.2594
8 h after dark	20.5437	17.7073	23.3801
12 h after dark	19.50145	19.0838	19.9191