condition	mean	min	max
4 h after light	7.830156666666667	7.71205	8.008410000000001
8 h after light	7.8652	7.819439999999999	7.9309199999999995
12 h after light	7.806563333333334	7.630380000000001	7.94983
4 h after dark	7.93711	7.81625	8.00994
8 h after dark	7.81498	7.7431	7.88802
12 h after dark	7.907923333333333	7.82452	8.04458