Actually unlabeled hybrids are the most difficult to correctly identify because there are so many of them, so unless you're in the industry manufacturing these things, it's really hard to know for sure! Luckily nearly all hybrid phalaenopsis have the same culture conditions (intermediate light, around 1500 foot candles, moist medium).

I have seen some phals looking like the photo you've posted - they were called Phal. Be Tris. Try googling the images and seeing if they kind of match.

Thanks Calvin!