condition	mean	min	max
4 h after light	6.206153333333333	6.05885	6.30371
8 h after light	6.08398	5.9400900000000005	6.27312
12 h after light	6.315143333333333	6.10189	6.6245
4 h after dark	6.55248	6.13051	6.9567
8 h after dark	6.34281	6.1045	6.627999999999999
12 h after dark	6.581846666666666	6.17305	6.868519999999999