Not surprised that soilless culture works for them. 
But do you know about how their light needs compare to those of the Pavlovsky citrus cultivars? I know they're famously more shade tolerant than most citrus. Just trying to get a general ordering of citrus light needs (I'm simultaneously digging through research papers for PPFD saturation values, although that's not exactly the same thing 
)
From my personal experiences, the most demanding citrus plants, when it comes to sum of sunlight and high temperatures to get good fruit are citrus grandis and citrus nobilis, both I consider as tropical, not subtropical species.
Typical marks of citrus fruit grown in deficiency of sunlight and high temperatures are extremely thick albedo, sometimes nearly no pulp, low brix, higher bitterness.
On the other hand, some citruses from blood category need nontropical weather with some hours close to zero celsius and different night and day temperatures to reach good pulp coloration.
