condition	mean	min	max
4 h after light	18.452392	18.25117	18.653614
8 h after light	19.6109045	18.556413	20.665396
12 h after light	19.272239499999998	16.126492	22.417987
4 h after dark	19.227506499999997	18.556413	19.8986
8 h after dark	18.815481	17.18433	20.446632
12 h after dark	14.548964	14.548964	14.548964