condition	mean	min	max
4 h after light	7.8420645	7.435941	8.248188
8 h after light	7.599964	6.922898	8.27703
12 h after light	7.6562765	7.062977	8.249576
4 h after dark	6.8941025	6.486775	7.30143
8 h after dark	7.0133475	6.721178	7.305517
12 h after dark	8.137793	8.137793	8.137793