condition	mean	min	max
4 h after light	6.9203	6.82189	7.040430000000001
8 h after light	7.09492	6.86137	7.4587699999999995
12 h after light	6.836233333333333	6.7332	7.00166
4 h after dark	6.5948166666666665	6.3987300000000005	6.97646
8 h after dark	6.507153333333333	6.177919999999999	6.78044
12 h after dark	6.4913	6.46674	6.53546