well i guess it depend on your humidity
my humidity on my windowsill is usually 50%-60% and 70%-90% at night. But with the unusual hot temperatures lately is bringing down my humidity some.
My ceph seems to be doing fine with this humidity as well as my Sang and Judith Finn. My Glabrata and Sibu x Hamata are still acclimating so I don't know yet. Glabrata has made 2 new leaves except for 1 is slightly smaller but other than that only a couple leaves died since I got it. And the Lady Pauline cutting I got from Jimmy is doing very well making leaves with pitcher stubs. =) So I guess it all depends on your humidity in your area. You should try getting a thermometer with a humidity gauge and see what it tells you