Hi-PRO lamps are manufactured with a new Thermal Management circuit design (Temperature Control).  If the lamp heats up in an application to 110°C, it will automatically reduce itself to 70% of rated wattage.
If the ambient temperature continues to increase and reaches 120°C, it will reduce itself to 50% of rated wattage.  In the event this happens, the lamps will remain at that level until they are turned off at which time they will reset and come back on a full brightness.