condition	mean	min	max
4 h after light	6.845476666666666	6.789219999999999	6.879739999999999
8 h after light	6.757693333333334	6.727710000000001	6.775580000000001
12 h after light	6.861619999999999	6.8424	6.88524
4 h after dark	6.91718	6.7180100000000005	7.04672
8 h after dark	6.814699999999999	6.6581399999999995	6.955439999999999
12 h after dark	6.80188	6.70533	6.89146