condition	mean	min	max
4 h after light	18.32335	17.7998	18.8469
8 h after light	19.32345	19.1563	19.4906
12 h after light	17.8918	17.5536	18.23
4 h after dark	23.88065	22.0126	25.7487
8 h after dark	23.6007	22.8723	24.3291
12 h after dark	22.0715	21.8427	22.3003