Time flies. I remember you starting that test. How was lumen maintenance until the end? Our did you stop sampling it after a while?

@electronupdate

4 жыл бұрын

I stopped measuring after 25,000 hours. Lumens up to that point were fine with little decrease in light.

@bigclivedotcom

4 жыл бұрын

@@electronupdate That's impressive. The filament LED approach seems to be one of the best for LED lighting. I do notice they're going the usual route of driving the filaments harder and harder though.

@vgamesx1

4 жыл бұрын

@@bigclivedotcom I kinda like them the best as well, I had a few smaller E14 filament bulbs using the lamp for roughly 3 hours a night, a 6 filament lasted around six months before it started flickering and a 4 filament lasted about a year and the one with only 2 has lasted far longer. Edit: Oh yeah and I also quite like the bar lights with a metal back like these: www.ebay.com/itm/30CM-50CM-LED-Aluminum-Alloy-Shell-Under-Cabinet-Lamp-Strip-Hard-Light-Tube-Bar/142151598175

@Wiresgalore

4 жыл бұрын

@@bigclivedotcom That is one thing which drives me absolutely bonkers with the progression of modern LED replacements. They start out with a high quality product with a high cost of entry, then slowly make manufacturing cheaper and drive fewer diodes harder until the quality is marginal at best. Then late adopters who waited for prices to come down feel essentially cheated by an (unbeknownst to them) inferior product. Happened with CFLs too up until their phase-out. I'd gladly pay a few bucks per lamp for one which lasts 5-10 years, which I'm confident is entirely possible. Heat kills semiconductors and capacitors, who knew?

@MACTEP_CHOB

4 жыл бұрын

@@Wiresgalore And now they last few years at best. Well, you can't expect anything else if case t ~ 90°C

I remember when it was first put in.

When these filament LEDs came out, I questioned the thermal design of the LED strips as there didn't appear to be sufficient heat sinking. Given the lifetime, I'd say I was wrong! I've torn down a lot of failed LED bulbs and have found that it is about half driver and half LED failures.

Thank you for the follow-up!

New Light Bulb Cartel: “You may not use a high rated Capacitor, so as to keep life span down!”

You made a follow up after 5 years! You're the best! I was watching you first video and went on google to look for a long term test at the same time. It was a pleasant surprise when this video started :) .

70 V is quite typical for these. There are usually about 10 blue LED chips in series in each "filament" stick, and if I diagnosed it correctly your bulb had 4 of these sticks, two each in parallel and then these parallels connected in series, so you would have a two parallel strings of about 20 LEDs in series, each running at 3 V to 3.5 V.

I was wondering if you were still running this test. Glad to see you did. EXCELLENT!!!!

The end of an era.

thank you for the experiment

Thank you. Nice video

A very welcome addition to my day

Thanks a lot for this long term testing !

Great test. I had actually forgotten that it was ongoing.

It makes me want to install DC led lighting with a centralized power supply... Or at least find high quality bulbs that last 25 years. Got a suggestion for this?

@johnpossum556

4 жыл бұрын

@purplevideotube: You don't need to go through all that work. This is a bad form factor. Buy a different form factor that allows heat to escape. For instance, I bought 2700K Maxxima brand dimmable retrofit can types from homedepot.com almost a decade ago and they are still going strong. I never buy the kind of bulb EU has shown here because they get overcompacted. It was definitely the heat that destroyed that cap. Secondly I've got just everyday generic cheap 3528 SMD "strip lighting" from Amazon on a DC power SMP supply that has run over 10 years 24/7. I stuck them to the bottom of a metal tool holder so that afforded them some extra heat relief. I've also got some toggled brand dimmable 4 feet LED 5000K bulbs that are working flawlessly though they've only been going like 3-4 years. But I mention all these brands and details because I'd buy them again.

Thanks for sharing!

welcome back , good to hear you are ok.

And such is the story for all modern led bulbs. It's almost always the power supply board that fails before the LEDs. I really wish someone would make bulbs that you can easily access the PS board.

I had an F20T12 tube paired with a magnetic rapid start ballast and lasted 10 years if not more and over 25000 hours yet here is the ironic thing about it, the tube was rated for 4 years of service life at 9000 hours if used for 3 hours each day but I used it for much longer. It lasted twice as long as that led and is probably still going strong to this day.

i would like to see a test with half hour on then half hour off for many years

Is a shame that they end up dying when the LEDs still probably have plenty of use left.

i am happy that you are all okay and fine during coronavirus outbreak..thanks for new video

I've bought 3 6W led filament bulbs like yours and all 3 had the filament fail(after 2-5 years). Possibly due to higher drive current? There was 6 filaments with 3 parallel and 2 series set up and once one filament dies it increases the current in other 2 and causes a cascade failure

Good to see how that test worked out. Such a pity they cheap out on power supply components. It would have been interesting to see how long the LED filaments would have lasted if you could just switch out the blown fuse and cap then fire it up again.

Good to know.

are you testing any other bulbs in there now?

Do you have an opinion on what would have made a more reliable cct...is it just the chinese skimping on quality of primary components, environmental or even lower dependence on just one component?

@DanafoxyVixen

4 жыл бұрын

"Do you have an opinion on what would have made a more reliable.." dude it ran non stop for 5 years... thats pretty reliable

@Daan87423

4 жыл бұрын

@@DanafoxyVixen Sure, but it's a bottleneck that could potentially be solved

@peterpv0001

4 жыл бұрын

@@Daan87423 Sure it can be solved but that costs money. As mentioned elsewhere, 5 years is already pretty good. Also note that it requires expensive tests to be able to guarantee that longer lifetime. That added cost is OK for a component in for example a car. But for a lightbulb, the manufacturer would like you to buy a new bulb. See how the bulb needs to last long but not too long :-)

@johnpossum556

4 жыл бұрын

@Peter: It's the poor form factor of trying to put new technology into the confines of old technology. See my response above and I mention what has lasted longer for me & why.

What was the stated life of the bulb?

It would be interesting to document how LED brightness drops over the lifespan. Some note a significant drop in brightness in the first few months with same power consumption, making them much less "environmentally friendly" than they have been pitched as.

💡⚰️😢😢 F Goodbye intrepid old friend

What a sad day...

There's 700 volts on a LED?

@peterpv0001

4 жыл бұрын

No, it's around 70 V but we cannot see the dot in "70.0" as there's a light reflection preventing us to see it.

Sadly these are failure-optimised these days. If the driver fails first, that means the LEDs could have been driven hotter.

Caps only? So boring. I had tons of burned chips, also inside failure.

That's about the way I've aged.

_I wonder what it would have taken to get the 700 volts down to something more reasonable._

@MACTEP_CHOB

4 жыл бұрын

And why would you?

Was working fine until they started installing 5G masts. Coincidence? I think not! ;-)

@poiiihy

4 жыл бұрын

lol no

@xiro6

4 жыл бұрын

the led got coronavirus from those masts,for sure.