Generally too much light causes reddish leaves. Additionally high light levels lead to yellowish green leaves like some of the ones on your Catt. But the yellow is not an indicator of too much light, just high light. On the other hand too little light leads to dark green leaves. These are the generalizations that I use pertaining to light and leaf color.

I think it is normal for Encyclia randii to have reddish leaves.

The main one im worried about is the one cat cuz its leaves r pink and almost see threw. And considering these orchids are under 2 flourecent tubes i dont think there getting thr high end light to make them go red ....