Awesome little plants! I also have tannii and tannii v alba and all of them are wonderful for under lights.
Very compact, easy grower, and blooms for months and months. They bloom on old leafless canes and they just keep pushing out bloom after bloom.
Bright light...let dry slightly btwn waterings and just leave it be to do it's thing.
This is still a fairly young plant and in a few years it should be stunning.
It's just getting geared up for this bloom cycle and will be even better in a month. If I can remember...I'll try to get some update pics. For now though...