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How come LED Light Bulbs only last for about 2-3 Years?

How come LED Light Bulbs only last for about 2-3 Years?

I've bought and replaced a lot of light bulbs, and I noticed that all of them said "up to 20,000 hours" which would be about 5 years given 12 hours of daily use (which we definitely don't).

115 comments
  • i have 7 bulbs since 2019
    none of them failed so far.

    all the lifespans i found ranged between 15.000 to 25.000 hours ( which btw was equated to 1.000 hours per year instead of 5.000 per year)

    so this doesn't sound normal to me.

    how manny(in use) bulbs do you have?
    what brands do you use?

  • Maybe stop buying the seizure-brand ones from Amazon?

    I think I've had to replace one bulb in my entire house in the last 6 years or so.

  • My smart LED bulbs don't even say how long they last, but my experience with LEDs in general tells me they will last practically forever. Out of all the LED things I have, the only ones with any burnt out lights are a couple of cheap LED strips I have and I can't even be sure the ones that are dead weren't because of where I cut the strip. I've had those things for over 12 years now and they're in my PC which is always on.

    Afaik, the biggest threat to killing the LED is heat, and some cheaper LED bulbs have really poor heat dissipation. Technology Connections has a video about them, which may be more informative.

  • Killer of LED bulbs is heat. If you have some in fixtures that trap heat you should either replace the fixtures or get high quality bulbs for those fixtures. Look for bulbs rated for hot locations. And for outdoors make sure it's rated for wet areas.

    • I wonder if somebody will ever make some sort of like light bulb extender that has some cooling fins on it to go between your light bulb and the socket and to offer a secondary path for some of that heat to get out.

  • Are you sure you have the same set up for voltage and resistance? If you don't you'll pass more current and burn out faster. Similar to a laptop marketing saying 14hrs, but that's only if you leave it on low power, airplane mode, and don't do anything useful. I'm curious to see if someone comments the real answer.

115 comments