They are very seasonal ; if you miss the season, you just have to wait until next year. I had trouble flowering them until I found out that they really do need high light. A certain US nursery - maybe recently closed - specialising in them claimed 1500- 3000 FC which is very very bright, perhaps even higher trhan I could possibly give in Uk, but we do flower them well here , despite that ; maybe he has a duff meter !