condition	mean	min	max
4 h after light	6.374883333333333	6.18804	6.50551
8 h after light	6.100076666666666	5.95517	6.22928
12 h after light	6.13527	5.945119999999999	6.32089
4 h after dark	6.205073333333334	5.99279	6.4335
8 h after dark	6.7944700000000005	6.61936	6.9814
12 h after dark	6.788693333333334	6.704960000000001	6.84576