condition	mean	min	max
4 h after light	6.46796	6.40802	6.52511
8 h after light	6.5501933333333335	6.28123	7.021710000000001
12 h after light	6.405856666666667	6.15322	6.83252
4 h after dark	6.429553333333333	6.32265	6.5948899999999995
8 h after dark	6.59535	6.260669999999999	6.98942
12 h after dark	6.564113333333333	6.46336	6.7616