I need to buy one BA15D to replace a burned out Halogen 120V 75W garage
stair light that is attached to the side wall.

It doesn't need to be brightly lit as it's a short set of open steps and
it's not on a dimmer so I don't care about the wattage all that much.

But I was told by someone dimmable LEDs are more robust than non dimmable
LEDs.

Amazon has three kinds of 12V BA15D LEDs with respect to dimmability
[1] some don't say if they are dimmable
https://www.amazon.com/BA15D-Bayonet.../dp/B07GKCC76Q
[2] some say they're not dimmable
https://www.amazon.com/BA15D-AC100V-.../dp/B07RFFZ914
[3] some say they are dimmable
https://www.amazon.com/Equivalent-40.../dp/B08DP6CWNS

What makes an LED dimmable anyway? Is it just advertising hype?
Or does the electronics have something special I can actually see inside?

On 12/7/20 2:16 PM, james wrote:
I need to buy one BA15D to replace a burned out Halogen 120V 75W garage
stair light that is attached to the side wall.

It doesn't need to be brightly lit as it's a short set of open steps and
it's not on a dimmer so I don't care about the wattage all that much.

But I was told by someone dimmable LEDs are more robust than non dimmable
LEDs.

Amazon has three kinds of 12V BA15D LEDs with respect to dimmability
[1] some don't say if they are dimmable
https://www.amazon.com/BA15D-Bayonet.../dp/B07GKCC76Q
[2] some say they're not dimmable
https://www.amazon.com/BA15D-AC100V-.../dp/B07RFFZ914
[3] some say they are dimmable
https://www.amazon.com/Equivalent-40.../dp/B08DP6CWNS

What makes an LED dimmable anyway? Is it just advertising hype?
Or does the electronics have something special I can actually see inside?

Try sci.electronics.design if no one here has an answer.

In alt.home.repair, on Mon, 7 Dec 2020 15:46:08 -0600, Dean Hoffman
wrote:

On 12/7/20 2:16 PM, james wrote:
I need to buy one BA15D to replace a burned out Halogen 120V 75W garage
stair light that is attached to the side wall.

It doesn't need to be brightly lit as it's a short set of open steps and
it's not on a dimmer so I don't care about the wattage all that much.

But I was told by someone dimmable LEDs are more robust than non dimmable
LEDs.

All LEDs are long lasting. Decades, I think**. I wouldn't base my
choice on that. If you have no dimmer, you can use any one of the 3
below except are you sure your socket is bayonet style, and that there
are two contacts in the bottom of the socket? Like sewing machines
use? All 3 of them are recommended for sewing machines, that have
bayonet, insert and twist, mounts.

**Most of mine are on only a fraction of the time. Do they ever wear
out? "Unless an actual component in the LED fails, they will provide
light “forever.” While LEDs do not burn out like fluorescent lamps and
other bulbs they will, however, degrade and dim over time. The diode
itself will begin to emit less and less light as the years pass. Still,
LED lamps can last over 25,000 hours."

That's 3 years 24 hours a day. And if it dims, you said you don't need
much light.

Amazon has three kinds of 12V BA15D LEDs with respect to dimmability

None of these are listed as 12V. But if they were they wouldn't owk in
your fixture.

Also note that all are different wattages, so they are different bulbs
and maybe different in dimmabiliity.

You know you can ask questions on the Amazon Q&A section. You can ask if
it's really dimmable.

[1] some don't say if they are dimmable
https://www.amazon.com/BA15D-Bayonet.../dp/B07GKCC76Q

For this one, the first review said it was 12V but was mislabeled, and
that it blew up when he tried it in a sewing machine, that it was meant
for a car. But in the ad, it's still labeled as 110V and it's rated 4.4
out of 5. I didn't take the time to read other reviews, but I have once
seen a review that was about a totally different product than what it
referred to. Maybe there is a mistake somewhere, or they sent him the
wrong thing (Heck, I bought a refurb computer online and they sent me
the wrong model.

[2] some say they're not dimmable
https://www.amazon.com/BA15D-AC100V-.../dp/B07RFFZ914
[3] some say they are dimmable
https://www.amazon.com/Equivalent-40.../dp/B08DP6CWNS

What makes an LED dimmable anyway? Is it just advertising hype?

I doubt it. Just guessing.

Or does the electronics have something special I can actually see inside?

YOu mean if you break it open? Even simple things have gotten
amazingly complicated inside, IC's for example. Even if you broke open
a dimmable and an non-d, I don't know if you can tell what's there to
make the leds work and what's there to make something dimmable.

Try sci.electronics.design if no one here has an answer.

or sci.electonics.repair

On 12/8/2020 12:14 PM, micky wrote:
In alt.home.repair, on Mon, 7 Dec 2020 15:46:08 -0600, Dean Hoffman
wrote:

On 12/7/20 2:16 PM, james wrote:
I need to buy one BA15D to replace a burned out Halogen 120V 75W garage
stair light that is attached to the side wall.

It doesn't need to be brightly lit as it's a short set of open steps and
it's not on a dimmer so I don't care about the wattage all that much.

But I was told by someone dimmable LEDs are more robust than non dimmable
LEDs.

All LEDs are long lasting. Decades, I think**. I wouldn't base my
choice on that. If you have no dimmer, you can use any one of the 3
below except are you sure your socket is bayonet style, and that there
are two contacts in the bottom of the socket? Like sewing machines
use? All 3 of them are recommended for sewing machines, that have
bayonet, insert and twist, mounts.

**Most of mine are on only a fraction of the time. Do they ever wear
out? "Unless an actual component in the LED fails, they will provide
light €œforever.€� While LEDs do not burn out like fluorescent lamps and
other bulbs they will, however, degrade and dim over time. The diode
itself will begin to emit less and less light as the years pass. Still,
LED lamps can last over 25,000 hours."

That's 3 years 24 hours a day. And if it dims, you said you don't need
much light.

Amazon has three kinds of 12V BA15D LEDs with respect to dimmability

None of these are listed as 12V. But if they were they wouldn't owk in
your fixture.

Also note that all are different wattages, so they are different bulbs
and maybe different in dimmabiliity.

You know you can ask questions on the Amazon Q&A section. You can ask if
it's really dimmable.

[1] some don't say if they are dimmable
https://www.amazon.com/BA15D-Bayonet.../dp/B07GKCC76Q

For this one, the first review said it was 12V but was mislabeled, and
that it blew up when he tried it in a sewing machine, that it was meant
for a car. But in the ad, it's still labeled as 110V and it's rated 4.4
out of 5. I didn't take the time to read other reviews, but I have once
seen a review that was about a totally different product than what it
referred to. Maybe there is a mistake somewhere, or they sent him the
wrong thing (Heck, I bought a refurb computer online and they sent me
the wrong model.

[2] some say they're not dimmable
https://www.amazon.com/BA15D-AC100V-.../dp/B07RFFZ914
[3] some say they are dimmable
https://www.amazon.com/Equivalent-40.../dp/B08DP6CWNS

What makes an LED dimmable anyway? Is it just advertising hype?

I doubt it. Just guessing.

Or does the electronics have something special I can actually see inside?

YOu mean if you break it open? Even simple things have gotten
amazingly complicated inside, IC's for example. Even if you broke open
a dimmable and an non-d, I don't know if you can tell what's there to
make the leds work and what's there to make something dimmable.

Try sci.electronics.design if no one here has an answer.

or sci.electonics.repair


I have an LED shop light that just died, in less than a year.

On Tue, 8 Dec 2020 19:50:37 -0800, Bob F wrote:

On 12/8/2020 12:14 PM, micky wrote:
In alt.home.repair, on Mon, 7 Dec 2020 15:46:08 -0600, Dean Hoffman
wrote:

On 12/7/20 2:16 PM, james wrote:
I need to buy one BA15D to replace a burned out Halogen 120V 75W garage
stair light that is attached to the side wall.

It doesn't need to be brightly lit as it's a short set of open steps and
it's not on a dimmer so I don't care about the wattage all that much.

But I was told by someone dimmable LEDs are more robust than non dimmable
LEDs.

All LEDs are long lasting. Decades, I think**. I wouldn't base my
choice on that. If you have no dimmer, you can use any one of the 3
below except are you sure your socket is bayonet style, and that there
are two contacts in the bottom of the socket? Like sewing machines
use? All 3 of them are recommended for sewing machines, that have
bayonet, insert and twist, mounts.

**Most of mine are on only a fraction of the time. Do they ever wear
out? "Unless an actual component in the LED fails, they will provide
light “forever.” While LEDs do not burn out like fluorescent lamps and
other bulbs they will, however, degrade and dim over time. The diode
itself will begin to emit less and less light as the years pass. Still,
LED lamps can last over 25,000 hours."

That's 3 years 24 hours a day. And if it dims, you said you don't need
much light.

Amazon has three kinds of 12V BA15D LEDs with respect to dimmability

None of these are listed as 12V. But if they were they wouldn't owk in
your fixture.

Also note that all are different wattages, so they are different bulbs
and maybe different in dimmabiliity.

You know you can ask questions on the Amazon Q&A section. You can ask if
it's really dimmable.

[1] some don't say if they are dimmable
https://www.amazon.com/BA15D-Bayonet.../dp/B07GKCC76Q

For this one, the first review said it was 12V but was mislabeled, and
that it blew up when he tried it in a sewing machine, that it was meant
for a car. But in the ad, it's still labeled as 110V and it's rated 4.4
out of 5. I didn't take the time to read other reviews, but I have once
seen a review that was about a totally different product than what it
referred to. Maybe there is a mistake somewhere, or they sent him the
wrong thing (Heck, I bought a refurb computer online and they sent me
the wrong model.

[2] some say they're not dimmable
https://www.amazon.com/BA15D-AC100V-.../dp/B07RFFZ914
[3] some say they are dimmable
https://www.amazon.com/Equivalent-40.../dp/B08DP6CWNS

What makes an LED dimmable anyway? Is it just advertising hype?

I doubt it. Just guessing.

Or does the electronics have something special I can actually see inside?

YOu mean if you break it open? Even simple things have gotten
amazingly complicated inside, IC's for example. Even if you broke open
a dimmable and an non-d, I don't know if you can tell what's there to
make the leds work and what's there to make something dimmable.

Try sci.electronics.design if no one here has an answer.

or sci.electonics.repair


I have an LED shop light that just died, in less than a year.
Either the driver died or a connection broke. I've seen numerous
"cold solder joint" problems on high bay arrays.

On 12/8/2020 9:16 PM, Clare Snyder wrote:
On Tue, 8 Dec 2020 19:50:37 -0800, Bob F wrote:

On 12/8/2020 12:14 PM, micky wrote:
In alt.home.repair, on Mon, 7 Dec 2020 15:46:08 -0600, Dean Hoffman
wrote:

On 12/7/20 2:16 PM, james wrote:
I need to buy one BA15D to replace a burned out Halogen 120V 75W garage
stair light that is attached to the side wall.

It doesn't need to be brightly lit as it's a short set of open steps and
it's not on a dimmer so I don't care about the wattage all that much.

But I was told by someone dimmable LEDs are more robust than non dimmable
LEDs.

All LEDs are long lasting. Decades, I think**. I wouldn't base my
choice on that. If you have no dimmer, you can use any one of the 3
below except are you sure your socket is bayonet style, and that there
are two contacts in the bottom of the socket? Like sewing machines
use? All 3 of them are recommended for sewing machines, that have
bayonet, insert and twist, mounts.

**Most of mine are on only a fraction of the time. Do they ever wear
out? "Unless an actual component in the LED fails, they will provide
light €œforever.€� While LEDs do not burn out like fluorescent lamps and
other bulbs they will, however, degrade and dim over time. The diode
itself will begin to emit less and less light as the years pass. Still,
LED lamps can last over 25,000 hours."

That's 3 years 24 hours a day. And if it dims, you said you don't need
much light.

Amazon has three kinds of 12V BA15D LEDs with respect to dimmability

None of these are listed as 12V. But if they were they wouldn't owk in
your fixture.

Also note that all are different wattages, so they are different bulbs
and maybe different in dimmabiliity.

You know you can ask questions on the Amazon Q&A section. You can ask if
it's really dimmable.

[1] some don't say if they are dimmable
https://www.amazon.com/BA15D-Bayonet.../dp/B07GKCC76Q

For this one, the first review said it was 12V but was mislabeled, and
that it blew up when he tried it in a sewing machine, that it was meant
for a car. But in the ad, it's still labeled as 110V and it's rated 4.4
out of 5. I didn't take the time to read other reviews, but I have once
seen a review that was about a totally different product than what it
referred to. Maybe there is a mistake somewhere, or they sent him the
wrong thing (Heck, I bought a refurb computer online and they sent me
the wrong model.

[2] some say they're not dimmable
https://www.amazon.com/BA15D-AC100V-.../dp/B07RFFZ914
[3] some say they are dimmable
https://www.amazon.com/Equivalent-40.../dp/B08DP6CWNS

What makes an LED dimmable anyway? Is it just advertising hype?

I doubt it. Just guessing.

Or does the electronics have something special I can actually see inside?

YOu mean if you break it open? Even simple things have gotten
amazingly complicated inside, IC's for example. Even if you broke open
a dimmable and an non-d, I don't know if you can tell what's there to
make the leds work and what's there to make something dimmable.

Try sci.electronics.design if no one here has an answer.

or sci.electonics.repair


I have an LED shop light that just died, in less than a year.
Either the driver died or a connection broke. I've seen numerous
"cold solder joint" problems on high bay arrays.


So far, I can't figure out how to take it apart without trashing it.
Can't find anyone online that has either.

It's the HF $20 unit.

In article ,
says...

I have an LED shop light that just died, in less than a year.
Either the driver died or a connection broke. I've seen numerous
"cold solder joint" problems on high bay arrays.



If not a bad solder joint, probably a component other than the LED went
bad. Most likely a capacitor.

I have had several of the screw in bulbs (the 60 watt replacement type)
go bad. Opened one up and put some power on the LEDs and they lit up.
Did not do more testing.

In alt.home.repair, on Tue, 8 Dec 2020 19:50:37 -0800, Bob F
wrote:

On 12/8/2020 12:14 PM, micky wrote:
In alt.home.repair, on Mon, 7 Dec 2020 15:46:08 -0600, Dean Hoffman
wrote:

On 12/7/20 2:16 PM, james wrote:
I need to buy one BA15D to replace a burned out Halogen 120V 75W garage
stair light that is attached to the side wall.

It doesn't need to be brightly lit as it's a short set of open steps and
it's not on a dimmer so I don't care about the wattage all that much.

But I was told by someone dimmable LEDs are more robust than non dimmable
LEDs.

All LEDs are long lasting. Decades, I think**. I wouldn't base my
choice on that. If you have no dimmer, you can use any one of the 3
below except are you sure your socket is bayonet style, and that there
are two contacts in the bottom of the socket? Like sewing machines
use? All 3 of them are recommended for sewing machines, that have
bayonet, insert and twist, mounts.

**Most of mine are on only a fraction of the time. Do they ever wear
out? "Unless an actual component in the LED fails, they will provide
light “forever.” While LEDs do not burn out like fluorescent lamps and
other bulbs they will, however, degrade and dim over time. The diode
itself will begin to emit less and less light as the years pass. Still,
LED lamps can last over 25,000 hours."

That's 3 years 24 hours a day. And if it dims, you said you don't need
much light.
....
I have an LED shop light that just died, in less than a year.

Those things have several/many LEDs, right? So if they all stopped at
once, it's not the leds themselves but some part, supplying power to
them, that they share.

In article , NONONOmisc07
@fmguy.com says...
hose things have several/many LEDs, right? So if they all stopped at
once, it's not the leds themselves but some part, supplying power to
them, that they share.




Yes, there are many single LEDs in one bulb or tube. I have not taken a
tube apart, butthe screw 60 watt replacement has about a dozen LEDs in
them I think they are in a series/parallel arangement electrically. I
am sure the tubes are the same way or they may all be in series like the
old Christmas tree lights.

Depending on how they are made and color the individual LRD usually take
from just under 1 volt to about 3 volts for normal brightness. They are
actually current dependent and not voltage dependent as long as they
have that 1 to 3 volts across them.

On Mon, 7 Dec 2020 15:16:17 -0500, james
wrote:

I need to buy one BA15D to replace a burned out Halogen 120V 75W garage
stair light that is attached to the side wall.

It doesn't need to be brightly lit as it's a short set of open steps and
it's not on a dimmer so I don't care about the wattage all that much.

But I was told by someone dimmable LEDs are more robust than non dimmable
LEDs.

Amazon has three kinds of 12V BA15D LEDs with respect to dimmability
[1] some don't say if they are dimmable
https://www.amazon.com/BA15D-Bayonet.../dp/B07GKCC76Q
[2] some say they're not dimmable
https://www.amazon.com/BA15D-AC100V-.../dp/B07RFFZ914
[3] some say they are dimmable
https://www.amazon.com/Equivalent-40.../dp/B08DP6CWNS

What makes an LED dimmable anyway? Is it just advertising hype?
Or does the electronics have something special I can actually see inside?
The electronics is definitely more complex - and behaves MUCH
differently

On 12/7/20 3:16 PM, james wrote:
I need to buy one BA15D to replace a burned out Halogen 120V 75W garage
stair light that is attached to the side wall.

It doesn't need to be brightly lit as it's a short set of open steps and
it's not on a dimmer so I don't care about the wattage all that much.

But I was told by someone dimmable LEDs are more robust than non dimmable
LEDs.

Amazon has three kinds of 12V BA15D LEDs with respect to dimmability
[1] some don't say if they are dimmable
https://www.amazon.com/BA15D-Bayonet.../dp/B07GKCC76Q
[2] some say they're not dimmable
https://www.amazon.com/BA15D-AC100V-.../dp/B07RFFZ914
[3] some say they are dimmable
https://www.amazon.com/Equivalent-40.../dp/B08DP6CWNS

What makes an LED dimmable anyway? Is it just advertising hype?
Or does the electronics have something special I can actually see inside?


Every thing you wanted to know about dimmable LEDs, but were afraid to
ask ;-)

https://www.cypress.com/file/90081/download

On Tue, 8 Dec 2020 16:42:08 -0500, wrote:

On 12/7/20 3:16 PM, james wrote:
I need to buy one BA15D to replace a burned out Halogen 120V 75W garage
stair light that is attached to the side wall.

It doesn't need to be brightly lit as it's a short set of open steps and
it's not on a dimmer so I don't care about the wattage all that much.

But I was told by someone dimmable LEDs are more robust than non dimmable
LEDs.

Amazon has three kinds of 12V BA15D LEDs with respect to dimmability
[1] some don't say if they are dimmable
https://www.amazon.com/BA15D-Bayonet.../dp/B07GKCC76Q
[2] some say they're not dimmable
https://www.amazon.com/BA15D-AC100V-.../dp/B07RFFZ914
[3] some say they are dimmable
https://www.amazon.com/Equivalent-40.../dp/B08DP6CWNS

What makes an LED dimmable anyway? Is it just advertising hype?
Or does the electronics have something special I can actually see inside?


Every thing you wanted to know about dimmable LEDs, but were afraid to
ask ;-)

https://www.cypress.com/file/90081/download
Except it doesn't even address the issue at hand - a LED driver that
will dim the LED in responseto a standard domestic lamp dimmer (triac
edge triggered?)

On Tue, 8 Dec 2020 16:42:08 -0500, wrote:

On 12/7/20 3:16 PM, james wrote:
I need to buy one BA15D to replace a burned out Halogen 120V 75W garage
stair light that is attached to the side wall.

It doesn't need to be brightly lit as it's a short set of open steps and
it's not on a dimmer so I don't care about the wattage all that much.

But I was told by someone dimmable LEDs are more robust than non dimmable
LEDs.

Amazon has three kinds of 12V BA15D LEDs with respect to dimmability
[1] some don't say if they are dimmable
https://www.amazon.com/BA15D-Bayonet.../dp/B07GKCC76Q
[2] some say they're not dimmable
https://www.amazon.com/BA15D-AC100V-.../dp/B07RFFZ914
[3] some say they are dimmable
https://www.amazon.com/Equivalent-40.../dp/B08DP6CWNS

What makes an LED dimmable anyway? Is it just advertising hype?
Or does the electronics have something special I can actually see inside?


Every thing you wanted to know about dimmable LEDs, but were afraid to
ask ;-)

https://www.cypress.com/file/90081/download
Except it doesn't even BEGIN to address the concept of dimming a
conventional LED lamp via a TRIAC domestic dimmer - - -