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What Happened to the 100000 Hour LED Bulbs?

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Re: What Happened to the 100000 Hour LED Bulbs?

#341

Post by amatecha »

mrb wrote: post #235

Lifetime isn't even my #1 concern with LED bulbs. It's strobing/flickering. I film all the LED bulbs I buy in slow motion at 240 fps with an Android phone, and play the movie back on a PC with mplayer using the dot(".") key to move frame by frame. Here is a shot I made comparing 2 brands of LED bulbs: https://youtu.be/QbenId_F2RQ (Edit: yeah you don't have to transfer to a PC, just playing back in slow motion on the…

Yeah I can immediately tell when an area is illuminated by LED lights when I spot the strobing/flickering as I move my eyes and the saccade reveals the slow frequency of the light dispersal (or however it would be worded). It's super jarring and can be a bit disorienting.

Re: What Happened to the 100000 Hour LED Bulbs?

#342

Post by masklinn »

droithomme wrote: post #291
masklinn wrote: post #249

Earlier quoted context omitted.

> The major energy cost for clothes washing is heating the water. A rooftop solar water heater dramatically reduces energy use, often more than one would get from using the same space to install solar panels. Most modern washing machine are cold-water only, washing machines with a hot water inlet tend to be prosumer. Same with dishwashers.

OK, that's very interesting. It's not true in the US, never seen a cold only machine. Wait, are you talking about the machines that have an electric heating element inside the washer? And you can still wash warm and hot cycle, but they don't require a connection to the hot water heater? Or are you talking about machines (which I've never seen but am willing to accept exist in other countries) that actually only offer…

> Wait, are you talking about the machines that have an electric heating element inside the washer? And you can still wash warm and hot cycle, but they don't require a connection to the hot water heater? Or are you talking about machines (which I've never seen but am willing to accept exist in other countries) that actually only offer cold cycle as a washing option?

The former. I don't think I've seen a consumer-grade dual-intake washing machine in 10+ years.

OTOH Japan might actually have the second, I dimly recall my sister mentioning something along those lines.

Re: What Happened to the 100000 Hour LED Bulbs?

#343

Post by GordonS »

pbhjpbhj wrote: post #184
wil421 wrote: post #6

My father in law is a general contractor and religiously keeps all his LED bulb receipts. If anything goes out before the listed hours he returns it to HomeDepot. He hasn’t had any issue so far including some of the older bulbs described in the article.

Worth noting that in the UK the "statute of limitations" for getting a refund on a defective product is 6 years according to the Consumer Rights Act (what used to be the "Sale of Goods Act"). AIUI in EU we get default 2 years of warranty on all goods. And we get a 14 day cooling off period on goods that are the result of solicited sales (cold [phone-]calling, selling at your door), or are bought online. If an LED bul…

For information, it's not 6 years across the whole of the UK - it's 5 years in Scotland. Of course, that's still pretty good!

Re: What Happened to the 100000 Hour LED Bulbs?

#344

Post by ricardobeat »

mrb wrote: post #235

Lifetime isn't even my #1 concern with LED bulbs. It's strobing/flickering. I film all the LED bulbs I buy in slow motion at 240 fps with an Android phone, and play the movie back on a PC with mplayer using the dot(".") key to move frame by frame. Here is a shot I made comparing 2 brands of LED bulbs: https://youtu.be/QbenId_F2RQ (Edit: yeah you don't have to transfer to a PC, just playing back in slow motion on the…

On an iPhone - at least the 6S I have - you don’t even need to record a video. Just switching to slow motion in the camera app will instantly show you flicker in the live preview, I assume because it’s interpolating frames from the 120hz input.

Re: What Happened to the 100000 Hour LED Bulbs?

#345

Post by FooHentai »

HeyLaughingBoy wrote: post #166
Someone1234 wrote: post #64

Earlier quoted context omitted.

Slight tangent but "in-building DC" exists, and is rapidly gaining popularity but not via the medium many assumed: Power Over Ethernet. You can buy PoE LED light fixtures now, which are both powered and controlled over ethernet. You buy a single PoE switch, run some low voltage Cat6, and you can power an entire floor's worth of lighting. EEPoE (Energy Efficient PoE) offers more efficient PoE too which claims up to 94…

you can power an entire floor's worth of lighting ? Must be either very low current lighting or that's some pretty beefy Cat6. I think the average Cat6 cable is only 24 gauge and that won't carry a lot of current very far.

PoE+ will deliver 30W to the far end of up to 100M network cabling. Given that those cables radiate out to endpoint devices from a central point, rather than powering multiple devices in a ring/loop topology, the potential to power lots of devices over a wide area is huge.

Biggest problem tends to be accommodating the central power delivery device. Those big PoE switches run hot and loud.

Re: What Happened to the 100000 Hour LED Bulbs?

#346

Post by FooHentai »

noveltyaccount wrote: post #214
Someone1234 wrote: post #64

Earlier quoted context omitted.

Slight tangent but "in-building DC" exists, and is rapidly gaining popularity but not via the medium many assumed: Power Over Ethernet. You can buy PoE LED light fixtures now, which are both powered and controlled over ethernet. You buy a single PoE switch, run some low voltage Cat6, and you can power an entire floor's worth of lighting. EEPoE (Energy Efficient PoE) offers more efficient PoE too which claims up to 94…

TIL about PoE lighting. I always imagined homes would migrate to 12VDC and converge electronics with RVs.

A small DC-input PoE switch in your RV might be the next logical evolution :)

Re: What Happened to the 100000 Hour LED Bulbs?

#347

Post by masklinn »

Jedd wrote: post #318
mrb wrote: post #235

Lifetime isn't even my #1 concern with LED bulbs. It's strobing/flickering. I film all the LED bulbs I buy in slow motion at 240 fps with an Android phone, and play the movie back on a PC with mplayer using the dot(".") key to move frame by frame. Here is a shot I made comparing 2 brands of LED bulbs: https://youtu.be/QbenId_F2RQ (Edit: yeah you don't have to transfer to a PC, just playing back in slow motion on the…

A metal working friend told me recently that in Australia we're not meant / allowed to use fluorescent lights above lathes, as the flicker can disguise movement. This is slightly worrying.

Yeah gas discharge lamps (CFL, neons, halides) will flicker at twice the mains' frequency on a single-phase circuit, makes it very dangerous to use them as e.g. factory lighting. You can mitigate that by using 3-phase power supplies, high-frequency controller, or by supplementing the basic lighting with incandescent bulbs around machinery.

The stroboscopic effect is really fun right until you're in a place with lots of moving parts at a multiple of the strobe frequency.

OTOH it's also used to fine-tune engine timing and such: set a stroboscope at a fraction of the frequency you want, the engine is properly tuned when everything looks completely stopped. Makes it very easy to notice mistiming.

Re: What Happened to the 100000 Hour LED Bulbs?

#348

Post by JoeAltmaier »

lupire wrote: post #119
JoeAltmaier wrote: post #60

I toured a house looking to buy, 20 years ago. The old lady owner said "The light bulb over the door is going with me! I've had it 20 years and counting." It was a weird antique-looking thing with lots of wires and stuff in the clear glass bulb. Dim as hell. But 20 years! They don't make them like they used to.

wikipedia.org/wiki/Edison_light_bulb but they are sort of illegal thanks to: wikipedia.org/wiki/Energy_Independence_and_Security_Act_of_2007

There you go! That could have been it.

Re: What Happened to the 100000 Hour LED Bulbs?

#349

Post by nradov »

Consultant32452 wrote: post #325
JohnTHaller wrote: post #150

Earlier quoted context omitted.

Generally, a landlord wants someone licensed with insurance to handle something like that on the off chance something goes wrong. I was going to fix the fixture in my bathroom that was shorting a bit and burning out bulbs myself. Thankfully I called my owner and he had an electrician come in because it turns out a lot of the conduit above the fixture needed replacing due to age.

People who do handyman work for a living can and should carry liability coverage. example: https://www.progressivecommercial.com/business-insurance/han...

The majority of people doing handyman work without a contractor license are effectively judgment proof so liability coverage is kind of pointless.

Re: What Happened to the 100000 Hour LED Bulbs?

#350

Post by zepearl »

setquk wrote: post #12

I've taken every single LED bulb that has failed on me to pieces and it's always the same failure mode. The heatsink compound isn't applied properly to the back of the LED board. The LEDs immediately in the gaps smoke out. Alas this isn't a problem. If a lightbulb goes, Amazon send me a new one out now free of charge and tell me to throw the old one in the trash. This is one manufacturer, prevalent on Amazon, the Lon…

Philips vs. OSRAM

My flat has some sort of bad-quality switches and when switching on/off the lights I often used to have some failures when using classic light bulbs (I have no clue about electricity - in any case in some way when I press the on/off-button the transition seems to be "dirty").

4 months ago I bought a new lamp and decided to give OSRAM-bulbs a go (it's a well known brand in Europe but up until then I always used Philips) => 2 LED-bulbs failed within 2 weeks (I put in the 1st bulb => failed after 2 weeks => replaced it with a 2nd bulb => failed again after 2 weeks).

I then went back to using Philips-bulbs and the one I used to replace the last one which failed is still working now.

Philips seems to be, at least in my case, definitely better or at least more "lenient/tolerant" at least concerning my the switches installed in my flat.

Anybody having negative experiences with Philips or positive ones with OSRAM or the opposite?

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