condition	mean	min	max
4 h after light	7.75683	7.6366	7.92323
8 h after light	7.789106666666667	7.5344	8.00411
12 h after light	8.0109	7.9484699999999995	8.1003
4 h after dark	8.30045	8.178230000000001	8.4804
8 h after dark	8.180473333333333	8.15788	8.22231
12 h after dark	7.841413333333334	7.68775	7.947710000000001