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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?

#351

Post by ricardobeat »

pitaj wrote: post #317
nkurz wrote: post #311

I'm surprised that there is no mention in the article of "filament led" bulbs (and very little mention in the comments): https://www.greenbuildingadvisor.com/article/led-filament-bu... . They are based on the simple idea of stacking enough small LED's that they can run on mains voltage. You still need a rectifier to go from AC to DC, and a capacitor for smoothing, but no voltage conversion means there are fewer parts…

These result, generally, in a 120Hz flicker, which some people are sensitive to.

There’s no reason they can’t smooth out the power like other lamps (except space). The linked article mention manufacturers already doing this in 2014, surely you’ll find flicker-free versions. These are all over home improvement shops over here.

Re: What Happened to the 100000 Hour LED Bulbs?

#352

Post by tengbretson »

nine_k wrote: post #80
momentmaker wrote: post #36

The same could be said about every product... Appliances back in the days could last decades. Now you're lucky if they don't break in a few years. What do they say about the best type of customer? The best customer is a repeat customer :)

Just recalculate the price of the built-to-last appliance from 1980 into 2018 dollars. For the same amount, you'll buy a very decently made device today, too. By the same token, all the large CFL and LED lamps in my house are expensive high-CRI lamps. I've seen two CFLs go due to a failure in internal electronics, likely as a result of a power glitch. The longest-running CFL I had to date ran for 7 years, for 12+ hou…

> For the same amount, you'll buy a very decently made device today, too.

For most products I find this to simply not be the case anymore. What I find is the more you pay, the more "gizmos" and "features" you get that ultimately lead to earlier device failures than the cheap models.

Re: What Happened to the 100000 Hour LED Bulbs?

#353

Post by sydd »

phasetransition wrote: post #105

So, engineering lead of a (outdoor) led Luminaire manufacturer here. And our sales director used to work for one of the biggest Asian light bulb OEMs. Happy to answer specific technical questions out there that this article triggered.

What do you recommend to buy if I want a ~2700 lumen, high CRI (>90), and non flickering bulbs for home?

Re: What Happened to the 100000 Hour LED Bulbs?

#354

Post by sydd »

phasetransition wrote: post #285
badgers wrote: post #245

Earlier quoted context omitted.

My guess is that is has to do with IKEA's improving smart home trend [0]. I like the fact that the work with all three major platforms so I don't necessarily have to be all in on one if I decide to switch in a couple of years: "Trådfri [has] compatibility across Apple HomeKit, Alexa, and Google Assistant". [0] - https://www.wired.com/story/ikea-fyrtur-smart-blinds/

It has nothing to do with this. It has to do with details about the OEM for the Ikea product.

Leedarson? (according to http://wastonchen.com/3973.html ) Never heard of them, they make good LEDs?

Re: What Happened to the 100000 Hour LED Bulbs?

#355

Post by phasetransition »

m_rcin wrote: post #331
phasetransition wrote: post #205

Earlier quoted context omitted.

Ikea when the size is available, for reasons I cannot discuss here.

Do you have preference for a particular line of Ikea bulbs? (Ryet, Ledare, etc)

The higher end line (Ledare?)

Re: What Happened to the 100000 Hour LED Bulbs?

#356

Post by wlesieutre »

masklinn wrote: post #347
Jedd wrote: post #318

Earlier quoted context omitted.

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…

Some turntables include a strobing light and rings of dots around the edge for different speeds. If it's spinning at the correct speed the corresponding dots will stand still.

Re: What Happened to the 100000 Hour LED Bulbs?

#357

Post by ricardobeat »

SomeHacker44 wrote: post #335

My personal biggest problem with LED bulbs is that my entire (100 year old) home is wired with neutral free light wiring and a lot of 3-way switches. This makes using dimmers very hard and most do not support 3-way and many will not work with LEDs and no neutral wire. Some do - Lutron Caseta makes a nice neutral free dimmer that works on many of my bulbs - but others don’t and I then just use high efficiency incandes…

There are many recent LED models that have built-in dimming, you step through three or four brightness levels by flicking the switch on and off.

Or, switch entirely to Philips/Ikea smart bulbs which are very affordable now. I think dimmers as a wall-mounted fixture will be on the way out soon.

Re: What Happened to the 100000 Hour LED Bulbs?

#358

Post by ahartmetz »

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…

Shaking a hand with fingers spread out somehow works to spot flicker. If the light source flickers, you see oddly sharp finger positions in the air. It's not the most sensitive or easy to interpret method.

Re: What Happened to the 100000 Hour LED Bulbs?

#359

Post by phasetransition »

sydd wrote: post #354
phasetransition wrote: post #285

Earlier quoted context omitted.

It has nothing to do with this. It has to do with details about the OEM for the Ikea product.

Leedarson? (according to http://wastonchen.com/3973.html ) Never heard of them, they make good LEDs?

Leedarson is an OEM for many light bulbs you've seen on shelves in stores.

Re: What Happened to the 100000 Hour LED Bulbs?

#360

Post by macintux »

jandrese wrote: post #237
blattimwind wrote: post #102

Earlier quoted context omitted.

The expected life of incandescent bulbs follows power laws with pretty big exponents: w.r.t. intensity its to the third power, w.r.t. voltage to the sixteenth power. So if you e.g. put a 230 V bulb on 110 V power, it will be dim as hell, but boi will it last!

So what this is saying is that light bulb companies engineered their bulbs to need regular replacement and we could have had much much longer lifespans with somewhat dimmer bulbs?

That was discussed in the article, yes.
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