Hi Zindaginha
First suggestion, I would learn how to care for the plants you have before buying a bunch more. Maybe before buying any more. Otherwise you are setting yourself up for a bunch of frustration.
The humidity readings should be in percent. (If your meter is saying degrees, then your meter has a temperature mode, and you are reading temperature). If you mis-stated, no problem, 47 to 50% is fine for many orchids.
It is hard to say if your light situatiion is enough. Hopefully someone that grows you genera/species can weigh in. My guess is that the light may be low.
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