condition	mean	min	max
4 h after light	16.21985	15.4425	16.9972
8 h after light	12.1801	11.9315	12.4287
12 h after light	13.0047	12.5505	13.4589
4 h after dark	17.2207	16.4958	17.9456
8 h after dark	21.7425	21.3422	22.1428
12 h after dark	21.03915	20.9895	21.0888