Good post, woodgeek. BUT, I'd like to debate this line:
we are all now enjoying cheap, durable, LED bulbs
Sorry to pick apart your sentence, but my experience has been counter to this, more dramatically and consistently than I'd have ever predicted.
One example that comes to mind is my three lamp posts, each of which was populated with three 25W candelabra base tall bent tip bulbs. Always worked fine with incandescents, but since they're on several hours every night, I figured they'd be a good candidate for replacement with LED.
I bought what appeared to be a quality product at the local Lowes, and after learning you can't run all LED's in a lamp post in winter (they frost up badly due to lack of heat), I settled on putting one incandescent with two LED bulbs in each of the three lamp posts. This put enough heat into the lamp to keep it from frosting on cold winter nights, and I figured I'd be changing the incandescent once every year or three, but the LED's would last forever. Unfortunately, here's what happened:
- After less than 6 months, half the LED's were dead. Zero incandescent failures. I replaced each blown LED with an incandescent bulb.
- After 12 months, ALL the LED bulbs had died. I replaced the remainder with incandescents.
- Now, I believe 3 years since the experiment began, I'm just having to replace the first few incandescent bulbs.
The usage case may not have been ideal for LED's, although a PVC lamp post with a heavy brass topper that gets buffeted around in the wind all winter sure seemed to be an ideal situation for favoring anything
other than a tungsten filament rattling about in a vacuum bulb.
I have a few LED bulbs in this house, attics and the garage, and likewise have found them to not last any longer than an incandescent. The case for spending several times more, for a bulb that both looks worth and has equal to lesser real-world lifespan, doesn't seem to be there... yet.
And yes, I do understand the LED is likely fine, it's other passive components within the bulb circuitry almost certainly failing before the LED. But the end result is the same, it's a dead bulb assembly, headed for the landfill.