Congrats! I love Parvis...
Based on my experiences, micranthum is short-lived(10 days to 14 days) but armeniacum will last over a months(6 weeks)....P. Magic Lantern has short-lived flower too...please give an update about the lifespand of the flowers on this hybrid.
My Magic Lantern (a few over the years) all lasted good one month.
Micranthum was all over the place but I would say 2-4 weeks.
Armeniacum is reported to have lasted almost 3 months. Probably possible in cooler temperature with high humidity.
I don't know what the norm is but mine lasted for about 3-4 weeks.
I did have Norito Hasegawa (typically last 3-4week in bloom) that lasted for over 3 months indoor, dry and warm.
So I can safely say 3-4 weeks for parvis with some rare outliers.