Hello there! I've just signed up to this amazing forum - so hi everybody! In my living room I've built a greenwall which host several philondendron, ferns, bromeliads, etc. There are 2x70 watt metal halide and one 18 watt Flowering Led bulb shining on it. As it is an open system I wonder if I'm able to grow orchids on it as well. There is a pump which waters the wall every other day in the morning for 1 minute and I spray condensated water almost every evening.