condition	mean	min	max
4 h after light	8.513836666666666	8.42348	8.5596
8 h after light	8.307369999999999	8.173739999999999	8.48427
12 h after light	8.553496666666666	8.35693	8.76582
4 h after dark	8.005216666666666	7.89037	8.13069
8 h after dark	7.98956	7.93502	8.07367
12 h after dark	7.90564	7.73556	8.03024