Over time I believe the lighting you described will become problematic for your top shelf plants. I haven't studied it in a scientific way but I believe too much light ultimately slows down growth based on my observations in my grow room. I believe the high light levels cause most species of orchids unhelpful stress and some leaves with high levels of anthocyanins ultimately burn or fall off. Unlike succulents, stress does not improve the look of orchids and should be avoided. I have raised my lights where ever possible and in some cases I have resorted to shade cloth.
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