condition	mean	min	max
4 h after light	6.4791566666666665	6.3969	6.636989999999999
8 h after light	6.6640299999999995	6.11396	7.25523
12 h after light	6.993613333333333	6.68755	7.34818
4 h after dark	6.866363333333334	6.5898	7.2557100000000005
8 h after dark	6.87998	6.7372	6.96485
12 h after dark	6.91798	6.8176	7.0622300000000005