Need lightbulb help

Hi. This is not really a SmartThings question so if an admin wants to delete it, I understand.

Hoping there are some lightbulb nerds here.

I’ve got three pendants in the kitchen with US A15 size LED bulbs with E26 medium base. They’re GE bulbs with an expected lifespan of 13 years.

After about 13 months one of them is flickering. This will actually be the second time to replace these bulbs in less than 5 years.

Because they’re pendants, the bulb is hanging base-end up. Does that affect the lifespan? Are there bulbs made to be installed inverted?