Have to agree with Robert's recent post that this is popowii/humboldtii. We grow ours in typical caudatum conditions - more like a Paph. than a Phrag. in terms of watering.
Thank you everybody.
mine grows in the basement in the larger tank with T5 HO light and 20-21C during the day, 17-18C at night. RH is around 60%.
It is potted in a mix of bark, perlite, chunks of sphagnum moss and few river stones. I water it together with my paphs.