Personally I am not a fan of all LECA. In particular for Dens, which should be grown in tiny pots. Since each new growth only requires 1/2" or so, you do not need large pots.
If a Phal (needs abt 60% shade) does well in a given window, I would think that it is too low light for both Catts & Dens (both of which do well with 35-45% shade).
Den nobile types need cool, very bright and relatively dry conditions from Oct to March. Then ramp up watering & fertilizer, and move to same shade level as Catts.
Den Phal types prefer somewhat warmer (= intermediate to warm) temps year round, a little less water (but not actually dry conditions) in Dec-mid Feb. Reduce fertilizer a bit during winter too. They can be grown in bright to Catt light levels.
I tried one outdoors in full sun in NJ last summer. It was too bright, but only by a little. These can be grown in as little as 20% shade.
__________________
Kim (Fair Orchids)
Founder of SPCOP (Society to Prevention of Cruelty to Orchid People), with the goal of barring the taxonomists from tinkering with established genera!
I am neither a 'lumper' nor a 'splitter', but I refuse to re-write millions of labels.
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