condition	mean	min	max
0 h after light	18.18045	17.9263	18.4346
4 h after light	9.342385	9.12103	9.56374
8 h after light	10.61065	10.1546	11.0667
4 h after dark	15.01755	14.9807	15.0544
8 h after dark	18.93535	18.4218	19.4489
12 h after dark	16.39525	14.3807	18.4098