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).

  • BearOfaTime@lemm.ee
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    2 months ago

    I have a dozen that run 12+ hours a day. I’ve had 1 fail in 5 years.

    Don’t buy cheap LEDs, and don’t put them in enclosures that trap heat.

    • rtxn@lemmy.world
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      2 months ago

      Speaking from experience: LED drivers hate dirty power. If they burn out frequently, check the wiring for damage. I probably avoided a house fire.

      • Albbi@lemmy.ca
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        2 months ago

        Dirty power? Aww geez it’s been a few years since I last washed and waxed my power lines. Guess I gotta open up the walls again.

      • BearOfaTime@lemm.ee
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        2 months ago

        That’s a good point. LEDs dislike unstable power a LOT more than incandescent or fluorescent.

      • trolololol@lemmy.world
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        2 months ago

        As an EE graduate I want to hear more about what dirt means and what driver can be affected by it. I’d expect power electronics to stand 100% over voltage over short periods and easy 20% long term, which would blow up lots of other things on the house before the driver or the LED starts performing worse.

    • sparky1337@ttrpg.network
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      2 months ago

      Yep. When I moved into my house the previous owner had used all garbage Walmart LED’s. I think I had one fail each month and just bought a bunch on sale from Phillips eventually.

      Most common failure was the driver. So they turned into strobe lights lol. Most annoying failure ever.

      And more importantly, not every LED is dimmer compatible. Sometimes they’re super picky or just plain don’t work.

      • pseudonym@monyet.cc
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        2 months ago

        Can you recommend which ones to buy? I have the strobe light problem and it is indeed very annoying

        • sparky1337@ttrpg.network
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          2 months ago

          Generally I don’t buy anything else other than Phillips. They’re usually bulletproof if you don’t get the smart bulbs. I’ve not had a Phillips fail in ~10 years. But that’s a sample size of like 30 or so bulbs.

          • Blaster M@lemmy.world
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            2 months ago

            While I’ve had a Philips fail, it was due to environmental reasons. Otherwise, Philips bulbs have lasted me literal years for hours every day.

            I also run General Electric bulbs, and they’ve also lasted years.

        • snf@lemmy.world
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          2 months ago

          The strobe light problem might also be caused by putting a LED that’s not dimmer-compatible on a dimmer switch

      • trolololol@lemmy.world
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        2 months ago

        Oh dang, a cheap driver is probably $0.50 cheaper than a half decent one that can take the hit.

        In Australia anything has 12 months warranty by law, this factory would bankrupt quick.

  • CmdrShepard@lemmy.one
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    2 months ago

    Generally because you’re buying cheaper ones that aren’t built as well. Heat destroys LEDs and the cheap bulbs generally use fewer individual LEDs running at higher power to produce a given output in lumens. More expensive bulbs use more LEDs at lower power to achieve the same light output so that they’re not constantly being overdriven and last much longer.

      • acosmichippo@lemmy.world
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        2 months ago

        I have dozens of Philips Hue bulbs 6-10 years old and I honestly don’t think one of them has died. I’m sure they have lost some luminance over time, but they still get the job done no problem. I rarely run them at 100% anyway.

        But yeah I have also had some cheaper LED bulbs die within a few years.

        • quixotic120@lemmy.world
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          2 months ago

          Just fyi for anyone who would care about this: while hue bulbs are built well they are moving towards a model that requires you to put them on “the cloud”, even though they were sold for years and years without that requirement. The update will be mandatory whether you want it or not as part of Philips security being integrated into the app. It’s unclear what will happen if you don’t create an account and sign in at that point

          So if you’re like me and put all your iot shit on an isolated vlan without internet access they may not be the best option for you. Or if you just don’t want to support a company that wildly changes the tos years after purchasing their (expensive) product. I don’t want my home shit on the internet, I don’t trust Philips to put enough cash or effort into securing their servers, etc.

          The bulbs do work with zigbee though and that seems to be a viable alternative to using their hub/app although I haven’t tested it fully. This also means if you’re using them via HomeKit you’ll need some kind of bridge like home assistant

          • lone_faerie
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            2 months ago

            I’ve been using Philips Hue bulbs with Zigbee in Home Assistant for years without issue.

        • hperrin@lemmy.world
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          2 months ago

          I bought three of the gen 1 Philips Hue when they first came out and all three died within two years. I hope they’re better now, but I’ll never buy Philips Hue again.

          And in case you ask, they weren’t enclosed, they were in IKEA floor lamps. They were at 100% all the time, but I feel like if they can’t survive that, they shouldn’t be able to do it.

      • CmdrShepard@lemmy.one
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        2 months ago

        I just buy a cheap jumbo pack from Amazon. They’re like 15 bucks and last for years which is good enough for me.

  • millifoo@lemmings.world
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    2 months ago

    Heat.

    While the actual LEDs (*) may be rated up to 20,000 hours+ in optimum circumstances, but the actual 3rd party bulb manufacturers, especially the cheapo brands, are building bulbs with poor heat dissipation designs and cheap and/or poorly designed circuits. Same goes for other parts they may use, such as the power supply. To reach 20,000+ hours, you need everything - not just the LED - to be working optimally together.

    (*) the best LED makers out there right now, e.g. Nichia, Cree, Phillips - really do some amazing engineering.

    • shalafi@lemmy.world
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      2 months ago

      I was going to being up Nichia and Cree! (I’m a flashlight junkie, can’t help it.) There’s a world of difference in quality LEDs vs. cheap units.

      I have 3x CREE floodlight-style bulbs on my terrarium, never lost one. The CRI (color rendering index) is 90+ (94?) and the colors are natural. If you contrast those with a regular LED, the results are gross.

  • gravitas_deficiency@sh.itjust.works
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    2 months ago

    The same reason that western countries refused to buy the extremely hard to break Superfest glasses manufactured in the GDR (East Germany) during the Cold War: planned obsolescence and consumable goods mentality in the interest of profit (they got a west German salesman to take the glasses to a trade show, and nobody gave a shit, because part of the industry’s profit model at the time was the sale of new glass due to breakage.

    In point of fact: better, longer lasting LED bulbs DO exist, but they’re only sold in Dubai (due to the monarchy there basically decreeing that they wanted that to happen, so Phillips made them for them, but will NOT sell them outside of the country, because it would kill their sales elsewhere).

  • winterayars@sh.itjust.works
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    2 months ago

    They’ve been sabotaged by design. LEDs should last 10+ years if built even half away reasonably, but unfortunately the manufacturers basically got together and agreed to build them in such a way they would fail. Same as regular light bulbs, they just have to work harder.

    I still have some of the earliest modern LED bulbs on the market–old Philips ones, the AmbientLED (i think) with the yellow casing and large heat sinks. They’ve been running for like 15 years now and not a one of them has failed. I spent several hundred USD replacing all my bulbs with those back in the day and they’ve done me well.

    Modern bulbs are trash by comparison. Not because the technology is limited in some way but because they refuse to make anything to that quality anymore.

    We need an alternate solution to this planned obsolescence bullshit. Light bulbs hit 50k rated hours long ago and they were talking about making ones that went 100k+ but these days you can’t find anything above 25k. And that’s setting aside the fact that a lot of these rely on apps that could be dropped at a moment’s notice.

    • partial_accumen@lemmy.world
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      2 months ago

      I still have some of the earliest modern LED bulbs on the market–old Philips ones, the AmbientLED (i think) with the yellow casing and large heat sinks.

      I bought a couple of those for an enclosed fixture inside a skylight. The ceiling height there is 20 feet, plus another 2ft into the skylight tunnel. I bought those LED bulbs (at $40/each) because I never wanted to change them. Both bulbs were still fully functional 15 years later. I have since sold that house, but I bet they’re still functioning.

  • Kerb@discuss.tchncs.de
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    2 months ago

    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?

  • hperrin@lemmy.world
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    2 months ago

    Smart bulbs like this:

    Have PCBs with small LEDs surface mounted to them. This means that the on-off cycle of the bulb causes heat deformation cycles of the PCB. This stresses the foils in the PCB and can eventually cause them to lose connection. That’s one of the reasons why they’ll often start flickering or lose the ability to be cool white, warm white, or specific colors (the different kinds of LEDs in them).

    But bulbs like this (often called smart edison bulbs):

    Use longer/larger LEDs that aren’t mounted to the PCBs, and will probably last much longer. They are better at not overheating their own electronics.

    If you want the first kind to last longer, don’t run them above ~60% brightness.

  • dual_sport_dork 🐧🗡️@lemmy.world
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    2 months ago

    Typically it’s not the emitters – the LED’s themselves – that fail. If driven correctly, those have lifetimes of tens of thousands of hours. That’s what the manufacturer is advertising on the box. Yes, an individual LED when driven correctly will probably last 20,000 hours. (Usually more, depending on how pedantic you want to get. The 20,000 hour figure often quoted is the point where the emitter drops to 80% of its original light output.)

    LED “bulbs,” the type that replace filament bulbs in consumer fixtures, typically fail in their driver hardware. LED’s run off of low voltage DC and in the base of all of those LED conversion bulbs is a power conversion assembly that steps down and rectifies 120v/240c AC to whatever DC voltage the LED array in there expects. These are inevitably made out of whatever the cheapest passives and semiconductor components the manufacturer thinks they can get away with. These don’t last 20,000 hours, especially not in where they’re usually installed.

    The main killer for all semiconductor electronics, which includes both LED’s themselves and their driver circuitry, is heat. This is often exacerbated by the fact that LED replacement modules are usually stuck in enclosed light fixtures designed for filament bulbs that have insufficient ventilation to get rid of the waste heat from the components in an LED module. The insides of those enclosed ceiling light fixtures, the ubiquitous “boob light,” gets hot, even with only LED modules installed. Filament bulbs don’t care because they don’t have any electronics in them and how they work is literally by getting so hot the glow. But LED modules in that kind of environment will invariably suffer an early failure.

    The best way you can get your LED modules to last longer is to install them in a fixture where they’ll have a lot of air circulation available or at the very least which is not fully enclosed.

    • aaaaace
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      2 months ago

      Excellent.

      Also, the D stands for diode, which is a one-way passage for electricity, some rectifiers may use diodes in their circuitry. So another way to cut costs is to not rectify completely or well.

        • bizarroland@fedia.io
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          2 months ago

          I freaking hate that flicker so much. I can always tell when someone has done a cheap aftermarket headlight conversion because I’ll see the flicker out of the corner of my eye and my rearview mirrors and it’s incredibly distracting.

          • XeroxCool@lemmy.world
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            2 months ago

            Slightly different. The alternator on a car has a very variable frequency due to change in engine speed and it’s fed into the car’s regulator/rectifier, so the typical power supplied is stable. However, many cars will use the high beams at half-power to function as daytime running lights (DRLs). This is usually done by pulse width modulation (PWM) meaning it’s chopping up the power supplied at a nearly imperceptible speed. An incandescent bulb will have so much fade time that the choppy power will go unnoticed. From there, theses two possibilities that cause the bulb to flicker. Very cheap bulbs will show their choppy power supply directly by flickering, making them noticeable as the move across your vision. Some mid-range bulbs will have cheap smoothing circuits (since vehicle power is “dirty”) so there will be charge time and discharge time as the capacitors charge up and down, allowing and disallowing the emitter to light, creating a slower flash pattern. Higher end bulbs (ignoring the part where their beam pattern is still usually trash) should be able to accommodate the chopped power and run dimmer.

            You may also notice a similar flicker on LED tail lights where the brake light is a brighter tail light instead of a dedicated element. Such cars will use PWM for dimming and may flicker as they move across your view as well. Some of my car’s dash uses LEDs for backlighting and dimming the dash is done via PWM. If I glance across the steering wheel from side to side, it looks like “cruise” gets stamped across the view

    • AA5B@lemmy.world
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      2 months ago

      Hah, I have one three bulb boob light that’s my “trash” fixture because it gets whatever mismatched leftover I can find. At one point I had an LED, and incandescent and a CFL in it. It doesn’t have the extra ventilation that modern ones do so I’m sure it gets hot, but even that doesn’t seem to shorten the lives much

  • Blackmist@feddit.uk
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    2 months ago

    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.

  • tfw_no_toiletpaper@lemmy.world
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    2 months ago

    Mine work for I think over 10 years now. Some of the actual LEDs inside died but you don’t really notice 1-2 of 200 inside the bulb being dark.

    • ChaoticNeutralCzech@feddit.org
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      I have been dumpster-diving for LED bulbs for 5 years. None of them had 200 chips, they usually have about 5-30 packages with 1-6 diodes each for a total of around 30-60 so that they total some 90-180 V in series (I live in a 230V mains region, and the 330V rectified mains can be efficiently transformed to that voltage by an SMPS). Because they are in series, if one in the series chain fails open circuit (the most common way), the entire chain goes out. Yes, fixtures (not bulbs) with 100+ LED chips exist and if they are designed to operate at a low voltage with all chips in parallel, the failure of one will not affect the others.

      • hydroxycotton@lemmy.world
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        2 months ago

        This sounds like an interesting hobby? Care to share more about how/why you are into dumpster diving for lightbulbs?

        • ChaoticNeutralCzech@feddit.org
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          I saw Big Clive and DiodeGoneWild take some apart, and we had been using halogen or fluorescent ones at home because LED bulbs were over $10 back then. I thought I would learn something about electronics but not really, the failure modes are always the same: about 50% of the time, an LED burns out. 25% of the time, it’s the smoothing inductor gone open circuit. 10% of the time, a bad contact somewhere (usually solder joints on linearly-regulated ones). 5 % work out of the box for some reason. I remain adamant about not paying for LEDs even though dumpster diving is objectively not worth the trouble anymore.

    • Fuzzy_Red_Panda@lemm.ee
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      2 months ago

      +1 for philips.

      The problem is most of what the big box hardware stores in the US are selling are junk brands. And they won’t even offer basics like a philips 75-watt-equivalent soft-white led in their stores.

      The junk brand bulbs will fail in my kitchen light fixture after a year (they start flickering). The philips bulbs have never failed for me.

      A properly designed and produced led bulb should last like 20 years.

    • greyfox@lemmy.world
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      2 months ago

      I’ve got several full color Hue bulbs that are the most used lights in my house. I haven’t had a single failure in a decade.

      I was more than a little annoyed when they decided to stop supporting my original controller for them though.

  • plz1@lemmy.world
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    2 months ago

    I’ve had sets of LED under-cabinet lights powered on 24/7 for about 14 years. I think one bulb went bad, out of 12.

  • ShunkW@lemmy.world
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    2 months ago

    I have had the same light bulbs since 2012. One of them broke when I dropped it while moving. Otherwise, no issues at all. Philips brand that I bought a box of 12 of when I moved into an apartment that year. Maybe I’m just lucky, but still no issues.