condition	mean	min	max
4 h after light	17.669600000000003	17.5073	17.8319
8 h after light	15.91105	15.6776	16.1445
12 h after light	13.83765	13.0067	14.6686
4 h after dark	18.22415	16.7057	19.7426
8 h after dark	17.96445	17.2824	18.6465
12 h after dark	17.38765	16.3864	18.3889