condition	mean	min	max
4 h after light	6.5551466666666665	6.10804	7.334230000000001
8 h after light	6.711423333333333	6.41298	7.2920300000000005
12 h after light	6.67572	6.40721	7.18915
4 h after dark	6.8305	6.2473	7.57132
8 h after dark	6.838439999999999	6.40677	7.6607899999999995
12 h after dark	6.477720000000001	6.18225	6.8899300000000006