$1 cheapie LEDs bought in 2012 still holding up

All the bulbs in my camper are still factory original after almost 4 years, except for one bulb. I've replaced it 4 times. It's the outside scare light on the street side (drivers side) (back side of the camper. It an 1156 bulb. However, the last one I put in late last Summer seems to be holding up this time! Sometimes they make-em good, and sometimes they make-um bad.