I don't grow these, but since you've had no replies, here's what I have found
According to IOSPE PHOTOS
alata is a synonym for Stelis tenuilabris ..
Cold to warm growing, very low light (shade ?)
and IOSPE PHOTOS
warm to hot growing, very low light (shade ?)
Unfortunately - that was all I could find ...
Hopefully some other members can be of more help!
Thanks, that's the only info I've been able to find as well. I'm going to have to guess on culture, luckily both of them are over crowded in their pots with multiple leads so I can divide them and experiment. Maybe a member with orchidwiz will be able to find culture info on these guys.