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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?

#151

Earlier quoted context omitted.

Pro tip: Home Depot recently started to allow receipts to be pulled up and items to be returned with just a credit card. Ikea does this too if you always scan your Family Card.

> if you always scan your Family Card i.e., if you agree to be tracked.

if you don't pay cash, you are also being tracked (credit cards)... and soon/now you will also need a mask/burka to avoid being tracked (facial recognition).

Re: What Happened to the 100000 Hour LED Bulbs?

#152
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.

I’ve found that Cree is very responsive for warranty replacement. I usually just email them with a picture of the dead bulb and approximate date of purchase and a new bulb shows up in my mailbox a week or so later.

Re: What Happened to the 100000 Hour LED Bulbs?

#153

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.

How do you predict product lifetime?

There are standardized tests for all this stuff, as you might imagine. One in this case would be the LM80 test.

Source: https://www.amazon.com/LED-Lighting-Primer-Future/dp/1449334...

Re: What Happened to the 100000 Hour LED Bulbs?

#154
Idiots cant properly heatsink or design proper power drivers.

Which is why I run a bank of blue diodes in a bridge rectifier setup, drop in a tank circuit, and hook directly to AC power, and cover with a remote phosphor with high persistence.

10 years and still going. Zero flicker.

Every other company are simply amateurs when it comes to designing simple and functional solutions.

Re: What Happened to the 100000 Hour LED Bulbs?

#155
post #148

Earlier quoted context omitted.

There's a simple joy in trading out some dying halogen bulbs for so much brighter LED bulbs which use the same power. It's absolutely optimizing in the wrong place, but it's super satisfying.

Why is it wrong? Halogens are a fire hazard and a heat nuisance.

From an energy expenditure angle it's wrong when you could focus on upgrading washer/dryer/fridge, that sort of thing. But those are good points.

Re: What Happened to the 100000 Hour LED Bulbs?

#156

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.

How much does it cost to make a LED bulb that runs no hotter than 45C at all times?

Re: What Happened to the 100000 Hour LED Bulbs?

#157
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…

This is in contradiction with the article, which says that the driver is the cause in 90% of cases.

EDIT: This was not entirely correct as the article says:

> The US Department of Energy (DoE)’s solid-state lighting program supports research and development of LED technologies, and their website contains volumes of data on LED lighting systems. Their Lifetime and Reliability Fact Sheet contains data on the failure rate of 5,400 outdoor lamps over 34 million hours of operation. Interestingly, the LEDs themselves account for only 10% of the failures; driver circuitry, on the other hand, was responsible almost 60% of the time. The remainder of failures were due to housing problems, which may not be as applicable for bulbs in indoor use.

Re: What Happened to the 100000 Hour LED Bulbs?

#158
I was an early adopter thinking it would save a bunch of money in the long run. I went all Cree and happened to have a few Philips. The Philips are still standing tall, one burned out of the two after like 7 years. However there's these eco incandescent lights I installed in my parent's bathroom that are connected to a standard fixture powered trough one of the Lutron Maestro dimmer switches. Those bulbs have never failed possibly going on 8 years+. I'm pretty convinced that their fade in fade out dimming when you turn on/off the switch makes a graceful ramp of current that the filament never gets shocked to suffer rapid thermal expansion that eventually fails the bulb.

Cree has a good 10 year warranty though, I've sent in boxes of dead bulbs to them. However many substitutes are dying out too and they're included in many of the replacements that are going back for my next batch.

Re: What Happened to the 100000 Hour LED Bulbs?

#159
post #141

I bought some G9 bulbs, and they are not performing like the halogens... It doesn't give me the full RGB like halogens and my house looks pale white(lacks red) instead of full color. I might go back, I do not like the look of my house, and I find myself turning on my living room lights AND dining room lights. The brightness wasn't there. There is massive improvement to be made on LEDs still.

If you're getting a pale white, "operating room" color - look into "warm white" (instead of cool white or "sunlight") LED bulbs. I've found them to be the closest to an incandescent you can get. Be aware, though, that some "warm white" bulbs are toward the "cooler" end of the range and look more white; you'll need to try a few brands to find the color temp you like.

Yeah the G9s we bought had nothing labeled. Going to give amazon a try.

Re: What Happened to the 100000 Hour LED Bulbs?

#160

Earlier quoted context omitted.

>requires an electrician to replace the whole fixture would like a word with you. Kind of like how replacing a gas dryer "requires" a licensed plumber to make the gas connection or you're "required" to drive no faster than the speed limit at all times. You're getting the runaround. If it was in a vacant apartment that they were showing to people it would already be fixed. If they cared about getting it done ASAP they…

yeah, darn those pesky laws around liability getting in the way of some good old-fashioned handiwork.

Few plumbers or electricians with a license are going to waste their time replacing your dryer or light fixture. They probably will send their (unlicensed) employee who's paid a couple bucks over minimum wage to do it. Their time is better spent on jobs that actually require their expertise. You know, the kind of jobs where you'd pay extra for a credentialed expert anyway. They probably will never set eyes on whatever you called them for.

Those laws (especially when combined with licensing requirements that exclude all but those who have a full time career in that field) are a massive hindrance to individuals and many businesses. They usually amount to little more than a potential transfer of liability. If your house burns down maybe you can try to point the finger at the licensed professional (good luck at that). The only thing it accomplishes is making it (slightly) harder for people who are habitually grossly negligent to keep working in that field. This is a non-benefit IMO because so much business is based on reputation anyway. The downside is that by artificially raising the minimum price access to access skilled labor you cause all sorts of work to be forgone because people can't afford it.

Plenty of house fires have been started by people who couldn't afford to pay an electrician but could afford an extension cord.

Edit: Since I'm apparently so wrong does anyone want to explain why. A down-vote without a reply is roughly synonymous with "your opinion is inconvenient to me but I cannot refute it"

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