Thanks all for info - my thinking was that because it is IR, it will fall outside the light spectrum that a plant would be able to react/interact with, and therefore shouldnt cause any adverse reactions...
I have a device that would allow me to program/control my aircon according to a schedule, allowing me to make temperature shifts between my day and night temperature more controllable, and allow automatic AI changes to the aircon settings depending on temperature and humudity, and it works on IR...
Going to give it a go ...