On 8/9/13 13:15 , HankG wrote:
What is the maximum wattage (equivalent) currently on the market? Am
currently 'all-incandescent' and use mostly 100 & 150 watt bulbs.

Are current LEDs living up to their price vs. longevity value? Forgetting
energy savings, are they worth the money being charged?

HG




So far, I"m getting the equivalent of 75w incandescent light out of
one 8.5W LED lamp.

Color temperature is 3000k, vs 2800K for CFL's installed.

Only a bit of time will verify that the longevity expectations are
being met.

White LED's are well known to fade over time, if pressed. Time and Time.

As for high output....there is an A19, 2700K white with a draw of 10.2
W, with a rated equivalent of 100W.

In other formats, an R40 18W 3000K with an equivalent output of 120W

And a PAR 38, 23W 3000K, 150W equivalent.


These are all rated at 50,000 hours.

Not bad if it makes half that number.

On 8/9/2013 2:33 PM, D. Peter Maus wrote:

So far, I"m getting the equivalent of 75w incandescent light out of
one 8.5W LED lamp.

The URL/ ad that you quoted said:

Stock Code: ETI-520163MD
8.5 Watt - LED Light Bulb - Omni-Directional A19 - 3000K Warm White - 600 Lumens - 50 Watt Equal

They advertise it a 50 watt equivalent but you are saying it's the same
as 75 watts. If it really is close to 75, one would think they would not
be shy and call it 75.

Are you actually measuring the lumen output or just "eyeballing" it? Do
you have higher than 'normal' line voltage?

Not pickin' on ya, D.P. It's just that inquiring minds want to know why
the difference. :-)

On 8/9/13 18:48 , Joe from Kokomo wrote:
On 8/9/2013 2:33 PM, D. Peter Maus wrote:

So far, I"m getting the equivalent of 75w incandescent light out of
one 8.5W LED lamp.

The URL/ ad that you quoted said:

Stock Code: ETI-520163MD
8.5 Watt - LED Light Bulb - Omni-Directional A19 - 3000K Warm White -
600 Lumens - 50 Watt Equal

They advertise it a 50 watt equivalent but you are saying it's the same
as 75 watts. If it really is close to 75, one would think they would not
be shy and call it 75.

Are you actually measuring the lumen output or just "eyeballing" it? Do
you have higher than 'normal' line voltage?

Not pickin' on ya, D.P. It's just that inquiring minds want to know why
the difference. :-)


Dial it back, Joe.

I did mention that I used a light meter to measure the output. Were
you not reading?


White LEDs do not directly produce light, like a single color LED.
They produce a wavelength and expose it to a phosphor which causes the
phosphor to flouresce. Since that's a ablative process, the output of a
white LED diminishes over time, depending on how hard the phosphor is
worked.

White LED lamps are correctly rated at an average luminary output
over time.

I'm at the beginning of these lamps' life cycle. So output is higher
than rated.

On 8/9/2013 2:33 PM, D. Peter Maus wrote:

So far, I"m getting the equivalent of 75w incandescent light out of
one 8.5W LED lamp.

On 8/9/13 18:48 , Joe from Kokomo wrote:

The URL/ ad that you quoted said:

Stock Code: ETI-520163MD
8.5 Watt - LED Light Bulb - Omni-Directional A19 - 3000K Warm White -
600 Lumens - 50 Watt Equal

They advertise it a 50 watt equivalent but you are saying it's the same
as 75 watts. If it really is close to 75, one would think they would not
be shy and call it 75.

Are you actually measuring the lumen output or just "eyeballing" it? Do
you have higher than 'normal' line voltage?

Not pickin' on ya, D.P. It's just that inquiring minds want to know why
the difference. :-)

On 8/10/2013 7:46 AM, D. Peter Maus wrote:

Dial it back, Joe.

I did mention that I used a light meter to measure the output. Were
you not reading?

Yes, I was reading and here is what you said, input, not output:

First blush, nicer, more color accurate light. And, using my light meter, more of it for the energy input.

"...using my light meter, more of it for the energy input"? Maybe my bad
or maybe not. Your grammar is a little convoluted and it really isn't
very clear (to me at least) what that statement meant. To most people,
energy *input* refers to the 8.5 watts the bulb draws from the AC line,
not the lumen *output*.

You further state:

I'm at the beginning of these lamps' life cycle. So output is higher than rated.

It would be interesting to see if the manufacture has a graph that shows
lumen output versus hours of operation.

On 08/09/2013 11:15 AM, HankG wrote:
What is the maximum wattage (equivalent) currently on the market? Am
currently 'all-incandescent' and use mostly 100 & 150 watt bulbs.

Are current LEDs living up to their price vs. longevity value? Forgetting
energy savings, are they worth the money being charged?

HG



I don't think so; the CFLs are still the cheapest. I have a work light
with an LED for mechanical ruggedness.

I have a 150 Watt bulb I use to test 100 Watt guitar amps. I stopped
using incandescents almost 30 years ago.

On 8/10/13 08:49 , Joe from Kokomo wrote:

On 8/9/2013 2:33 PM, D. Peter Maus wrote:

So far, I"m getting the equivalent of 75w incandescent light out of
one 8.5W LED lamp.

On 8/9/13 18:48 , Joe from Kokomo wrote:

The URL/ ad that you quoted said:

Stock Code: ETI-520163MD
8.5 Watt - LED Light Bulb - Omni-Directional A19 - 3000K Warm White -
600 Lumens - 50 Watt Equal

They advertise it a 50 watt equivalent but you are saying it's the same
as 75 watts. If it really is close to 75, one would think they would not
be shy and call it 75.

Are you actually measuring the lumen output or just "eyeballing" it? Do
you have higher than 'normal' line voltage?

Not pickin' on ya, D.P. It's just that inquiring minds want to know why
the difference. :-)

On 8/10/2013 7:46 AM, D. Peter Maus wrote:

Dial it back, Joe.

I did mention that I used a light meter to measure the output. Were
you not reading?

Yes, I was reading and here is what you said, input, not output:

First blush, nicer, more color accurate light. And, using my light
meter, more of it for the energy input.



"...using my light meter, more of it for the energy input"? Maybe my bad
or maybe not. Your grammar is a little convoluted and it really isn't
very clear (to me at least) what that statement meant. To most people,
energy *input* refers to the 8.5 watts the bulb draws from the AC line,
not the lumen *output*.


And 'more of it' refers to the light measured with the light meter.



You further state:

I'm at the beginning of these lamps' life cycle. So output is higher
than rated.

It would be interesting to see if the manufacture has a graph that shows
lumen output versus hours of operation.

I'm sure they do. White LED's all decay.

On Saturday, August 10, 2013 11:04:47 PM UTC-5, D. Peter Maus wrote:
On 8/10/13 08:49 , Joe from Kokomo wrote:



On 8/9/2013 2:33 PM, D. Peter Maus wrote:



So far, I"m getting the equivalent of 75w incandescent light out of

one 8.5W LED lamp.



On 8/9/13 18:48 , Joe from Kokomo wrote:



The URL/ ad that you quoted said:



Stock Code: ETI-520163MD

8.5 Watt - LED Light Bulb - Omni-Directional A19 - 3000K Warm White -

600 Lumens - 50 Watt Equal



They advertise it a 50 watt equivalent but you are saying it's the same

as 75 watts. If it really is close to 75, one would think they would not

be shy and call it 75.



Are you actually measuring the lumen output or just "eyeballing" it? Do

you have higher than 'normal' line voltage?



Not pickin' on ya, D.P. It's just that inquiring minds want to know why

the difference. :-)



On 8/10/2013 7:46 AM, D. Peter Maus wrote:



Dial it back, Joe.



I did mention that I used a light meter to measure the output. Were

you not reading?



Yes, I was reading and here is what you said, input, not output:



First blush, nicer, more color accurate light. And, using my light

meter, more of it for the energy input.







"...using my light meter, more of it for the energy input"? Maybe my bad

or maybe not. Your grammar is a little convoluted and it really isn't

very clear (to me at least) what that statement meant. To most people,

energy *input* refers to the 8.5 watts the bulb draws from the AC line,

not the lumen *output*.





And 'more of it' refers to the light measured with the light meter.







You further state:



I'm at the beginning of these lamps' life cycle. So output is higher

than rated.



It would be interesting to see if the manufacture has a graph that shows

lumen output versus hours of operation.



I'm sure they do. White LED's all decay.











Brazilian mechanic uses plastic bottles and bleach to illuminate 1 million homes. www.standeyo.com The article links to www.dailymail.co.uk Brasil is the proper way to spell the name of that Country.

D. Peter Maus wrote:
On 8/9/13 18:48 , Joe from Kokomo wrote:
On 8/9/2013 2:33 PM, D. Peter Maus wrote:

So far, I"m getting the equivalent of 75w incandescent light out of
one 8.5W LED lamp.

The URL/ ad that you quoted said:

Stock Code: ETI-520163MD
8.5 Watt - LED Light Bulb - Omni-Directional A19 - 3000K Warm White -
600 Lumens - 50 Watt Equal

They advertise it a 50 watt equivalent but you are saying it's the same
as 75 watts. If it really is close to 75, one would think they would not
be shy and call it 75.

Are you actually measuring the lumen output or just "eyeballing" it? Do
you have higher than 'normal' line voltage?

Not pickin' on ya, D.P. It's just that inquiring minds want to know why
the difference. :-)


Dial it back, Joe.

I did mention that I used a light meter to measure the output. Were
you not reading?

My understanding is that a lumen is not directly a measure of
output power. It is modified by a weighting curve, I believe,
to reflect our eyes' varying response to different wavelengths.

So you need, of course, a light meter that reads true lumens,
not just power output (energy per unit time).

But I agree with your statement below that they may be quoting average
output over the rated life of the device.

White LEDs do not directly produce light, like a single color LED.
They produce a wavelength and expose it to a phosphor which causes the
phosphor to flouresce. Since that's a ablative process, the output of a
white LED diminishes over time, depending on how hard the phosphor is
worked.

Here's some info, albeit somewhat technical:

http://www.digikey.com/us/en/techzon...of-fading.html

I had no idea that the process involved the additional step. Nor did
I realize that fading might occur, caused by crystalline imperfections
that grow worse over time.

This article claims that the band gap is such that the naturally
produced radiation is towards the short wavelength end of the
visible, and that the fluorescence (phosphorescence?) adds in
the longer wavelengths so that the resulting radiation appears
white, i.e., distributed more uniformly across the visible
spectrum.

George

White LED lamps are correctly rated at an average luminary output over
time.

I'm at the beginning of these lamps' life cycle. So output is higher
than rated.

On Friday, August 30, 2013 3:36:38 PM UTC-5, George Cornelius wrote:
D. Peter Maus wrote:

On 8/9/13 18:48 , Joe from Kokomo wrote:

On 8/9/2013 2:33 PM, D. Peter Maus wrote:



So far, I"m getting the equivalent of 75w incandescent light out of

one 8.5W LED lamp.



The URL/ ad that you quoted said:



Stock Code: ETI-520163MD

8.5 Watt - LED Light Bulb - Omni-Directional A19 - 3000K Warm White -

600 Lumens - 50 Watt Equal



They advertise it a 50 watt equivalent but you are saying it's the same

as 75 watts. If it really is close to 75, one would think they would not

be shy and call it 75.



Are you actually measuring the lumen output or just "eyeballing" it? Do

you have higher than 'normal' line voltage?



Not pickin' on ya, D.P. It's just that inquiring minds want to know why

the difference. :-)





Dial it back, Joe.



I did mention that I used a light meter to measure the output. Were

you not reading?



My understanding is that a lumen is not directly a measure of

output power. It is modified by a weighting curve, I believe,

to reflect our eyes' varying response to different wavelengths.



So you need, of course, a light meter that reads true lumens,

not just power output (energy per unit time).



But I agree with your statement below that they may be quoting average

output over the rated life of the device.



White LEDs do not directly produce light, like a single color LED.

They produce a wavelength and expose it to a phosphor which causes the

phosphor to flouresce. Since that's a ablative process, the output of a

white LED diminishes over time, depending on how hard the phosphor is

worked.



Here's some info, albeit somewhat technical:



http://www.digikey.com/us/en/techzon...of-fading.html



I had no idea that the process involved the additional step. Nor did

I realize that fading might occur, caused by crystalline imperfections

that grow worse over time.



This article claims that the band gap is such that the naturally

produced radiation is towards the short wavelength end of the

visible, and that the fluorescence (phosphorescence?) adds in

the longer wavelengths so that the resulting radiation appears

white, i.e., distributed more uniformly across the visible

spectrum.



George



White LED lamps are correctly rated at an average luminary output over

time.



I'm at the beginning of these lamps' life cycle. So output is higher

than rated.

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