thats why you dont put the pipe right next to your plant....if its pretty far away by the time it reachs your plant the heat from the lights should of matched or surpassed the amount of cold air. plus considering how far your pipe is running and the fact that a/c registers aren't built to push air through a pipe you dont get THAT much air in the first place. its 80 next to my plant right now shes far from freezing.
