condition	mean	min	max
4 h after light	2.2966499999999996	2.20117	2.39213
8 h after light	1.78756	1.69846	1.87666
12 h after light	3.482915	3.43942	3.52641
4 h after dark	16.59115	16.0939	17.0884
8 h after dark	21.13865	19.8527	22.4246
12 h after dark	11.18265	10.4684	11.8969