condition	mean	min	max
4 h after light	19.327350000000003	18.329	20.3257
8 h after light	15.756350000000001	15.7439	15.7688
12 h after light	18.9435	17.8694	20.0176
4 h after dark	23.0709	22.0394	24.1024
8 h after dark	19.494349999999997	19.2184	19.7703
12 h after dark	22.24305	21.4129	23.0732