Thanks for the input. At last discussion with the customer, the lamps continue to "corkscrew". It definately is not an issue of being cold. It is actually rather warm at all times in this location. I find it odd that this was never an issue with the T12 fixtures that were previous to the T8's. The customer now states that when the lights are turned off, that now they "arc" in the tube from one end to the other. I am at a loss for answers at this time.
