condition	mean	min	max
4 h after light	6.97058	5.24603	8.69513
8 h after light	18.78785	18.2315	19.3442
12 h after light	19.53845	18.2373	20.8396
4 h after dark	24.30545	23.8456	24.7653
8 h after dark	9.22516	8.35152	10.0988
12 h after dark	11.3149	10.8882	11.7416