High Failure Rate

The lamp vendors may be able to offer more insight on the problem than the fixture manufacturer. There's not much about the fixture itself that impacts lamp life, the exception being socket contamination.

Ohm's law says that power is proportional to voltage and current. The alpha packs would have to be artificially increasing the voltage in order for a lamp to draw more power. There's no such thing as "pushing power".

Incandescent lamps purchased at the same time tend to fail at the same time since they have a similar life expectancy. All things being equal, lamp failure rate correlates with lamp usage.

If you have recently replaced lamps in the fixtures and those are failing then it's possible the lamp manufacturer had a bad batch, or the box of lamps got dropped in shipping which can adversely affect the filament or envelope seal.

A bit late to this discussion, but beyond the lamps being defective (I've received a bad batch before), but also inspect the pins on the lamps that go out. If you see anything except a smooth clean pin then your lamp base might be going out -- lots of reasons why this can happen. But the end result is that there is a small gap between the base and the lamp, causing arc'ing between the two which can cause premature wear on the lamp. These are field replaceable and the parts are affordable. Best thing to do is to keep track of when you swap out lamps on specific fixutres which can help identify if the problem is following the fixture or the lamp batch.