condition	mean	min	max
4 h after light	5.80472	5.31254	6.2969
8 h after light	5.71743	5.64707	5.78779
12 h after light	7.361965	7.1355	7.58843
4 h after dark	7.67334	7.65787	7.68522
8 h after dark	8.12815	7.38086	8.8611
12 h after dark	6.92405	6.22135	7.54756