A rare trip to the Poughkeepsie Railroad Station provided an opportunity to check out the LED bulbs in the chandeliers:
The 108 bulbs had only one deader (lower left in chandelier C).
I have no way of knowing if they’re the same bulbs from six years ago, but the accumulation of bugs / dust / crud inside the (what I would expect to be) sealed envelopes suggests they’ve been hanging there for quite a while:
The dark cruciform patches might come from failed LED chip strings, although the bulbs all had the same eyeballometric brightness. The patches all seem to have a hard lower edge, so we may be seeing shadows from dust accumulating atop the chips on the PCB.
They’re a definite step up from CFL bulbs, although still not as pleasant as OG incandescent filaments.
The Smell of Molten Projects in the Morning 
I see a grid pattern on the light bulbs; one of the vendors (Sylvania, maybe) made/makes LED bulbs that use a ventilated plastic envelope. That looks like the same pattern.
I had one pf those bulbs in a desk lamp, but replaced it. Not sure if it failed or if I needed more light.
Well, vent holes would certainly account for the crud buildup inside!