I just received my Constrictor NW pro modular cage it's 36x24x14. I purchased a pro product rhp. A 40 watt, it's been plugged in for about 3 hours now and isn't up to 83 degrees yet. I have it plugged into a hydrofarm thermostat, with probe directly on bottom of enclosure with 2 other thermometers and they all read just above 82 degrees. Is this normal, does it take that long to come up to temp?