I have to say that Hoya celata flowering in the regular house with no added lighting or humidity does my heart good.  After waiting so long for this Hoya, all the way back to when it was called Hoya pubicalyx White Dragon, it is great to finally have a mature specimen that flowers often.  I don’t know if you can see it in the photo, but there is a hint of pink in the flowers that I have not seen before.  Probably the dark conditions under which it bloomed caused this color variation.