Looking at small lamps to buy for the lamp post on the front walk, I was surprised to see that the much more expensive LED lamps only had a specified lifetime of 15,000 hours. The incandescent bulbs had a lifetime of 2,500 hours. So the LED lasts 6 times longer, though costs something like 30 times more. It looks like the reduced cost to power the lamp approximately compensates this, and they advantageously need less frequent changing, but still the short life is surpring.
I thought LEDs lasted much longer than this. For example, the OK indicator on my burglar alarm, which I can see from here, has been on 180,000 hours now.
Any idea why so short?