condition	mean	min	max
4 h after light	8.0971655	8.048222	8.146109
8 h after light	7.9560755	7.95161	7.960541
12 h after light	7.950604	7.939087	7.962121
4 h after dark	9.9208385	9.687203	10.154474
8 h after dark	8.761468	8.092935	9.430001
12 h after dark	8.948263	8.948263	8.948263