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They said the LED light bulbs would last 20 years. Last week I had to replace 5 of them that failed all at the exact same time, 6 month old bulbs. Clearly the

They said the LED light bulbs would last 20 years. Last week I had to replace 5 of them that failed all at the exact same time, 6 month old bulbs. Clearly there was some kind of power surge or disturbance that the power electronics didn't like; but yet here we are.

nine_k 8y ago
The LEDs themselves likely will last 20 years (though losing some of the brightness). The power electronics that feeds them off 110V (or 220V) is tiny because it has to fit into the lamp's base, cannot be too expensive for pricing reasons, but is still much more complex than the LED crystals. It has a much higher failure rate than the light-emitting parts.
- throwawaycanada 8y ago
  I'm sure that electric car manufacturers will have the same things to say when people point to previous claims of extreme longevity.
  - toomuchtodo 8y ago
    Does that matter if we get off of oil in the interim? It seems the argument should be for continuous improvement in the manufacturing process and a closed loop recycling system for failed components and batteries.
- justhelpingout 8y ago
  `let lifetime = max(...components_lifetime)` is like `let size = to_greeklish(base10(hard_drive_capacity))`. Some people don't care, but the people who do care are not going to thank you when they optimize on the basis of the appearance of a promise with an actual performance that is opposed to its appearance.
JohnJamesRambo 8y ago
An electric motor is not a cheap newly made LED light bulb? We know how long electric motors last since we have been using them since 1832. They seem to last a very long time. I haven't had your bad experiences with LED bulbs either though, mine seem to be lasting great so far.
ajuc 8y ago
LEDs last almost forever if they work within their parameters (mostly the temperature is important). They degrade quickly if they overheat. And above let's say 5W they will overheat if they are made out of plastic. So - these plastic ones are designed to fail, so why put a proper electronics there? So they skimp on power regulator as well (and that's probably what killed your LEDs). Buy LEDs with metal radiators - they are more expansive, but they aren't designed to fail in a few months and should really last decades.
- nerdwaller 8y ago
  This may be pessimistic, and relating back to the higher level comments on the auto side. Watching how current automotive manufacturers have gone due to the bean counters demanding higher margins - I don’t know that we can expect them to default to the better quality hardware. If they do, I’d expect it to be during the formative/adoption years and again decline toward higher margins.
zrobotics 8y ago
I've analyzed some failed LED bulbs, and what fails is the power supply. The LEDs themselves were likely still good, but especially the cheaper bulbs have inadequate cooling and very cheap & crappy power supplies.

nine_k 8y ago

The LEDs themselves likely will last 20 years (though losing some of the brightness). The power electronics that feeds them off 110V (or 220V) is tiny because it has to fit into the lamp's base, cannot be too expensive for pricing reasons, but is still much more complex than the LED crystals. It has a much higher failure rate than the light-emitting parts.

throwawaycanada 8y ago
I'm sure that electric car manufacturers will have the same things to say when people point to previous claims of extreme longevity.
- toomuchtodo 8y ago
  Does that matter if we get off of oil in the interim? It seems the argument should be for continuous improvement in the manufacturing process and a closed loop recycling system for failed components and batteries.
justhelpingout 8y ago
`let lifetime = max(...components_lifetime)` is like `let size = to_greeklish(base10(hard_drive_capacity))`. Some people don't care, but the people who do care are not going to thank you when they optimize on the basis of the appearance of a promise with an actual performance that is opposed to its appearance.

JohnJamesRambo 8y ago

An electric motor is not a cheap newly made LED light bulb? We know how long electric motors last since we have been using them since 1832. They seem to last a very long time. I haven't had your bad experiences with LED bulbs either though, mine seem to be lasting great so far.

ajuc 8y ago

LEDs last almost forever if they work within their parameters (mostly the temperature is important). They degrade quickly if they overheat. And above let's say 5W they will overheat if they are made out of plastic. So - these plastic ones are designed to fail, so why put a proper electronics there? So they skimp on power regulator as well (and that's probably what killed your LEDs). Buy LEDs with metal radiators - they are more expansive, but they aren't designed to fail in a few months and should really last decades.

nerdwaller 8y ago
This may be pessimistic, and relating back to the higher level comments on the auto side. Watching how current automotive manufacturers have gone due to the bean counters demanding higher margins - I don’t know that we can expect them to default to the better quality hardware. If they do, I’d expect it to be during the formative/adoption years and again decline toward higher margins.

zrobotics 8y ago

I've analyzed some failed LED bulbs, and what fails is the power supply. The LEDs themselves were likely still good, but especially the cheaper bulbs have inadequate cooling and very cheap & crappy power supplies.