I'm not sure if this may be contributing to the issue at hand or not, but you've made sure the probe wires are not in direct contact with AC lines? Apparently if you have your probe wire touch any cables plugged into a power outlet that could give false readings. This may not make a difference but figured it be worth checking.

Quote Originally Posted by BPGator View Post
I agree 88W seems low. He recommended that size to me for a T8, which is 4x2x1
Strange. Bob reccomended me a 65watt for my T12 4x2x2. I wonder if the models he assigned were decided by room ambient temps given? Frankly I'm surprised Bob gave op such a low wattage model.