condition	mean	min	max
4 h after light	19.92935	18.4848	21.3739
8 h after light	27.57555	25.8463	29.3048
12 h after light	25.20665	23.9358	26.4775
4 h after dark	24.78135	24.6468	24.9159
8 h after dark	21.95995	21.0266	22.8933
12 h after dark	21.2284	20.1425	22.3143