condition	mean	min	max
4 h after light	8.203945	8.15463	8.25326
8 h after light	12.2681	12.0136	12.5226
12 h after light	15.8382	15.2392	16.4372
4 h after dark	17.50075	17.4588	17.5427
8 h after dark	13.58825	13.505	13.6715
12 h after dark	10.932875	9.72925	12.1365