condition	mean	min	max
4 h after light	21.52975	20.2935	22.766
8 h after light	18.05325	17.5095	18.597
12 h after light	20.79305	20.3586	21.2275
4 h after dark	36.9041	35.9431	37.8651
8 h after dark	36.6121	35.843	37.3812
12 h after dark	33.8613	32.1314	35.5912