condition	mean	min	max
4 h after light	15.10935	12.8699	17.3488
8 h after light	16.8989	15.3608	18.437
12 h after light	18.39825	16.9647	19.8318
4 h after dark	22.188266666666667	21.0247	22.8936
8 h after dark	24.2742	20.8951	26.1216
12 h after dark	18.9263	16.6297	22.6186