condition	mean	min	max
4 h after light	7.79848	6.40519	9.19177
8 h after light	5.925605	5.68997	6.16124
12 h after light	5.84459	5.58329	6.10589
4 h after dark	8.125863333333333	7.8919	8.4767
8 h after dark	8.81047	8.5811	9.05404
12 h after dark	8.077113333333333	7.80087	8.23777