Electronics > Projects, Designs, and Technical Stuff
New LED lights reliability
timelessbeing:
--- Quote from: Marco on February 08, 2019, 11:54:00 am ---The US has its own brands though ... Topaz has 15W A19 bulbs.
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OK but we are getting off topic now. These Corepro are ordinary SMD LED bulbs. I know those exist, and as we discussed they're not very useful since they overheat easily. Are they rated for use inside enclosed fixtures?
It was suggested that filament bulbs were a better solution, hence I said:
--- Quote from: timelessbeing on February 07, 2019, 09:41:34 pm ---Pleases show me an LED filament bulb that can replace a 100W A19 ...
--- End quote ---
But I haven't yet seen any good candidates.
As I suspected, there still are no decent retrofit bulbs ...
djacobow:
I just need to stop and point out the arrogance on display in this thread. Such is common among engineers, and it is a good example of why engineers actually should generally not be allowed to design products unsupervised.
If you have found LED bulbs that are suitable for all of your needs, congratulations, that's great.
But it is absolutely insane to insist that this is a general principle good for everyone. It is up to each person considering LEDs to decide if they are bright enough, convenient enough, and reliable enough for them. In this thread, several people have pointed out that they are not, in fact, adequate for their needs. I find it rather bizarre that anyone would dispute another person's experience. But we see it over and over again:
"I need a 100W equivalent" --> "no you don't, these are plenty bright"
"I have old fixtures that kill retrofit LEDs" -> "well, get all new fixtures"
I think someone here even told someone else that the only light they need in their bedroom is to be able to get around at night. Maybe the person whose bedroom it is should decide that? My kids play and do homework in their bedroom.
You almost have to insinuate that the person saying the LEDs don't work for them are somehow deranged, rather than ordinary human beings who can identify if something is unsatisfactory for them.
As for me, I have deployed LEDs all over my home and they have performed well in some circumstances and poorly in others, and no, generally the retrofits have proven inadequate. At temperatures that don't kill elcos, you simply can't dissipate heat by radiation, and so the retrofits are dependent on convection, and that rules out an important swathe of potential retrofit applications. I think they'll crack this nut eventually, most likely by eliminating the most heat-intolerant parts of the lamp, not by berating customers.
Marco:
Thermal cycling of good old unleaded solder can kill it too.
james_s:
--- Quote from: djacobow on February 08, 2019, 04:03:02 pm ---"I need a 100W equivalent" --> "no you don't, these are plenty bright"
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What I see are people making blanket statements that lamps with these specs don't exist when in fact they do. Need 100W equiv? Philips makes a 1600 lumen A21 LED bulb, they're available at Home Depot among other places and they work fine, I have one in one of the few applications I have for such a bright lamp.
--- Quote from: djacobow on February 08, 2019, 04:03:02 pm --- "I have old fixtures that kill retrofit LEDs" -> "well, get all new fixtures"
--- End quote ---
No need to get new fixtures, there are retrofit bulbs that will tolerate most types of existing fixtures, for example these are rated for use in fully enclosed fixtures https://creebulb.com/60-watt-replacement-soft-white I have some of the previous generation in small enclosed ceiling globe fixtures and have yet to see a failure.
There are many poorly designed LED retrofit bulbs out there, and many that work well in some types of fixtures but are not appropriate for other types. It's not as simple as it used to be where you'd go out and buy a pack of bulbs of a given wattage and they would just work, but bulbs that work are available for a majority of applications, it's not as if they don't exist or have not yet been developed.
And for those really specific applications you can still get incandescent bulbs, or bulbs containing a small halogen capsule which are marginally more efficient than a standard incandescent, enough so to get around the energy regulations.
Also yes I will concede there is some arrogance, but also I see the same attitude as pops up in nearly any EV-related thread of "Well it doesn't work for my use case so it's a silly idea that is completely pointless all around and will never work" or "but what about this edge case?". Or the old "I tried a 99 cent unbranded Chinese bulb and it crapped out after a week so LED bulbs are all junk thought up by some kind of liberal conspiracy!"
jmelson:
--- Quote from: james_s on February 08, 2019, 09:45:04 pm ---
What I see are people making blanket statements that lamps with these specs don't exist when in fact they do. Need 100W equiv? Philips makes a 1600 lumen A21 LED bulb, they're available at Home Depot among other places and they work fine, I have one in one of the few applications I have for such a bright lamp.
Also yes I will concede there is some arrogance, but also I see the same attitude as pops up in nearly any EV-related thread of "Well it doesn't work for my use case so it's a silly idea that is completely pointless all around and will never work" or "but what about this edge case?". Or the old "I tried a 99 cent unbranded Chinese bulb and it crapped out after a week so LED bulbs are all junk thought up by some kind of liberal conspiracy!"
--- End quote ---
Yup, I'm a little late to the party. I did make 4 custom LED retrofits (detailed in earlier posts) but have now been replacing all my CFLs with LEDs as the CFLs expire. I usually get 3-5 years out of the CFLs, depending on usage. Bathrooms seem to be really HARD on CFLs due to the humidity. It is still too soon to know how well the commercial LED "bulbs" will do, but I've probably got a dozen installed now, and NONE have failed. Some have likely been in place 2 years or more. A number are in base-up fixtures, so that seems to make the electronics run hotter.
Jon
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