condition	mean	min	max
4 h after light	6.640893333333333	6.45202	6.81117
8 h after light	6.3534033333333335	6.1201	6.65004
12 h after light	6.293693333333334	6.09379	6.619510000000001
4 h after dark	6.42161	6.1746300000000005	6.815360000000001
8 h after dark	6.74264	6.61619	6.97311
12 h after dark	7.285463333333333	6.90712	7.805219999999999