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 Post subject: One minute in the life of a cheap LED bulb.....
PostPosted: Dec Mon 04, 2017 8:31 am 
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Location: Santa Cruz mountains
https://www.youtube.com/watch?v=yxkUZfhDcVw


This is a FEIT Electric LED light bulb from Costco. This is the fourth one to fail in as many months, all with the same failure mode. The box says 15,000 hours which should be at least 2-3 years of use, but these are failing every 2-3 months :x


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 Post subject: Re: One minute in the life of a cheap LED bulb.....
PostPosted: Dec Mon 04, 2017 10:50 am 
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Location: Connecticut
I'm not surprised .Those EcoSmart LED bulbs in the blue box from Home Depot are in the same boat with little life.I got 3 months out of a 60w bulb and 2 40w went dim and out in my kitchen ceiling fan about 4 months later.One of the set of 3 is still alive in the ceiling fan.I cracked open the 60w and found that the coil fell to bits as I touched it.I still have to do an autopsy on the 2 40w bulbs.I have a few FEIT Electric LED bulbs here and they are still working.I would crack it open crack it open and see what fried.The 2 40w bulbs are dimmable according to the box I think the old light dimmer switch done them in since its the old style.Maybe some spike transits from the old dimmer pot killed the bulbs.

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 Post subject: Re: One minute in the life of a cheap LED bulb.....
PostPosted: Dec Mon 04, 2017 1:43 pm 
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Location: Indiana
The complex that I work for just switched everything to LED. They order several thousand dollars worth of FEIT bulbs and two work days were entirely dedicated to switching bulbs. That was a month ago...

Luckily I wasn’t involved in the ordering process, that would be my supervisor.


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 Post subject: Re: One minute in the life of a cheap LED bulb.....
PostPosted: Dec Mon 04, 2017 5:05 pm 
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See the disaster I had when the neighbors bought those cheap Feit LED's from Costco.

http://www.antiqueradios.com/forums/viewtopic.php?f=2&t=314711

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 Post subject: Re: One minute in the life of a cheap LED bulb.....
PostPosted: Dec Mon 04, 2017 8:49 pm 
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Location: Connecticut
My town's elect company has a program that gives out LED light bulbs.They were Feit LED bulbs.Before that they were handing out Feit CFL bulbs.For the last few years the town hooked up with Home Depot and Lowes to have discounted LED bulbs of any brand.I try to pickup Sylvania when I'm there.Who knows why I picked up the EcoSmart LED bulbs at the time.

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 Post subject: Re: One minute in the life of a cheap LED bulb.....
PostPosted: Dec Mon 04, 2017 10:33 pm 
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Location: Fernandina Beach, FL
Primitiveradiogod wrote:
https://www.youtube.com/watch?v=yxkUZfhDcVw


This is a FEIT Electric LED light bulb from Costco. This is the fourth one to fail in as many months, all with the same failure mode. The box says 15,000 hours which should be at least 2-3 years of use, but these are failing every 2-3 months :x



Same thing happened to me with that brand. Of course, try to get them replaced...

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 Post subject: Re: One minute in the life of a cheap LED bulb.....
PostPosted: Dec Mon 04, 2017 10:51 pm 
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Joined: Jan Thu 01, 1970 1:00 am
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Location: Redlands CA
That's how one of my Cree bulbs failed, it was about 3 years old I think.
I've got a bunch of LEDs from the Thrift Store now, about $1.50 each subsidized by Edison, we'll see how long they last.


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 Post subject: Re: One minute in the life of a cheap LED bulb.....
PostPosted: Dec Mon 04, 2017 11:03 pm 
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Location: Georgia, 30236
I guess I've been lucky with the Feit LED Fluorescent style shop light I got. No noise nor crap outs. It's always good to find out which lights happen to be RFI rich or lifetime poor.

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 Post subject: Re: One minute in the life of a cheap LED bulb.....
PostPosted: Dec Mon 04, 2017 11:40 pm 
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Joined: Feb Sun 17, 2008 11:36 pm
Posts: 1909
Location: Dayton, Ohio
I think some of you guys are buying the wrong brand of bulbs.

My L609A1927KENCIL(?), failed yesterday, it lasted a whole 331 days. :roll:

Charlie


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 Post subject: Re: One minute in the life of a cheap LED bulb.....
PostPosted: Dec Tue 05, 2017 12:47 am 
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Joined: Jan Mon 17, 2011 8:57 pm
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Looks like that bulb turned into a Christmas tree bulb!

I only recently bought some led bulbs for the first time. I think they are from GE. Guess we will see how long they last.

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 Post subject: Re: One minute in the life of a cheap LED bulb.....
PostPosted: Dec Tue 05, 2017 2:18 pm 
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Location: Halfway between Possum Trot and Monkey's Eyebrow KY
I am using the El cheapo brand from lowes. So far lasted 2 years.
I bought a dollar one from dollar tree , we will see how long it lasts

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 Post subject: Re: One minute in the life of a cheap LED bulb.....
PostPosted: Dec Wed 06, 2017 12:14 am 
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Joined: Jun Wed 08, 2011 2:33 am
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Location: Ohio 45177
I thought the little LEDs should last about forever. But we got a large airliner here that has little blue LEDs in the sides of the seat pairs. Just an indicator, a part with some short leads that terminates in a little square plastic connector. At least 20 of them are dead on this plane. The replacements cost 1900$ each, so consider how much it will cost to fix all those dumb little lights. :o


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 Post subject: Re: One minute in the life of a cheap LED bulb.....
PostPosted: Dec Wed 06, 2017 12:35 am 
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Joined: Feb Sun 17, 2008 11:36 pm
Posts: 1909
Location: Dayton, Ohio
I suspect that to get the max candle power out of LED's, they are driving them too hard.

The light bulb replacement types also have a greater complexity drive circuit=higher probability of failure.

When I use a LED for annunciation on a piece of equipment, I drive at about 1/2 the LED current rating.

Charlie


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 Post subject: Re: One minute in the life of a cheap LED bulb.....
PostPosted: Dec Wed 06, 2017 1:21 am 
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Joined: Dec Sun 22, 2013 5:03 am
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Location: Santa Cruz mountains
It isn't the LEDs that are the problem; it's the power supplies that are crap.

It's easy to crack the bulbs open. A quick squeeze of the globe will crack the seal and allow removal of the globe. There are a number of LEDs arranged in a circular pattern on a PC board. In the center are some semiconductors, including what is probably a power MOSFET or something similar. I haven't taken the PC board off to see if there is anything underneath.

If I modded this to use my linear variable bench supply as the power source for the LEDs, I'm sure they would happily glow without fail for decades.

I have some earlier bulbs I bought at Costco. I used those in an overhanging kitchen counter fixture. Those bulbs have heat sinks in the base, and were bought probably four years ago. No signs of imminent death from those.

I also have some indoor / outdoor floods that are heat sinked as well. I put those in several years ago, and still going. They performed splendidly in the torrential rains we had here last year.

The Feit shop light I bought is also doing fine, even if it does have a bit of broad-spectrum RFI radiating from it.

My prediction: The cheap bulbs will probably be engineered to last about as long as the old incandescents did and no more. 15,000 hour bulbs will be a distant memory.


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 Post subject: Re: One minute in the life of a cheap LED bulb.....
PostPosted: Dec Wed 06, 2017 2:08 am 
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Joined: Aug Tue 02, 2011 10:47 pm
Posts: 1578
Location: New York, NY
In stores here it seems LED filament designs have rapidly taken over. Seems to be the way to go, with no drive electronics. I like the way they look and have several installed at home. It's too soon to tell if they'll outlive the earlier designs.


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