condition	mean	min	max
4 h after light	6.77064	6.6897	6.87453
8 h after light	6.823953333333334	6.45224	7.3380600000000005
12 h after light	6.67392	6.45359	6.83115
4 h after dark	6.310393333333334	6.14752	6.39677
8 h after dark	6.080233333333333	5.85177	6.2228699999999995
12 h after dark	6.066403333333334	5.966469999999999	6.2241800000000005