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Old February 5th, 2017, 04:13 AM   #1
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LED Light Bulbs

I just bought some this morning for only $2.25 per bulb. Life span is 13.7 years. They are 60W but look as bright as 100W. Estimated energy cost per year is $1.20. I bet they were made in China but I could care less as long as I get a reliable product. I think it was an Obama Mandate to get rid of incandescent household light bulbs. The box does not say if there are rare earth elements in them.
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Old February 5th, 2017, 04:48 AM   #2
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Glad to see they finally came out with cost-effective 120 VAC LED bulbs. I hope this is the demise of mercury laden compact fluorescent bulbs. The government has been trying to push the latter down our throats for quite some time.
My current and last homes are powered by 12 and 24 VDC, so I've been buying DC LED bulbs at a significant premium since 2011.
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Old February 5th, 2017, 04:54 AM   #3
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Quote:
Originally Posted by Pilgrim View Post
Glad to see they finally came out with cost-effective 120 VAC LED bulbs. I hope this is the demise of mercury laden compact fluorescent bulbs. The government has been trying to push the latter down our throats for quite some time.
My current and last homes are powered by 12 and 24 VDC, so I've been buying DC LED bulbs at a significant premium since 2011.
I was weaned on DC and became an adult in AC. I just love real science of any kind.
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Old August 3rd, 2017, 10:14 PM   #4
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Quote:
"They are 60W but look as bright as 100W." TS
That's a problem.
Us old guys have a good idea about how bright a "25 watt", or a "60 watt", or a "75 watt" incandescent light bulb is.

BUT !!

Those designations apply to power consumption, not luminosity.
So obviously a more energy efficient light generator (LED instead of incandescent) that draws the same amount of power will produce more light.

Thus the "Lumens" disclosure on LED packaging. It's to inform the shopper how bright the LED will be.
The more useful packages will list a conversion table: ie a 60 watt incandescent emits x Lumens, etc
so for an LED that's a 60 watt incandescent equivalent, buy the ...
Quote:
"I think it was an Obama Mandate to get rid of incandescent household light bulbs"
Congress.
For one household it might not make much difference, except to that one household.
But for the entire nation, it could result in nationally significant energy consumption reductions.
And the less energy we consume as a nation, the less fuel we have to import from OPEC.
So though it might not seem like it, banning the incandescent bulb was for U.S. national security purpose.
Quote:
"Glad to see they finally came out with cost-effective 120 VAC LED bulbs. I hope this is the demise of mercury laden compact fluorescent bulbs." P #2
Amen brother!
CFL's are such a danger that if one breaks in your home, there's a Haz-Mat protocol for clean-up.
That Haz-Mat procedure can be reviewed at EPA.gov > CFL cleanup.
Whatever you do DO NOT use a conventional vacuum cleaner on it!!
Quote:
"My current and last homes are powered by 12 and 24 VDC, so I've been buying DC LED bulbs at a significant premium since 2011." P #2
I live on a rural hilltop.
We have no street lights here, and my driveway is long enough to show up on the odometer, so they wouldn't help* even if we did.
So I built myself an uninterruptable power supply (UPS). You have to be careful. You could spend $thousands on a system that would self destruct in a week or two. You could even blow the roof off your house.

BUT !!

Mine is an excellent system.
And what I've done is, the key lights in my house are all 12 VDC LED that run directly off the UPS.

Superb!

And I've been running it enough years to know:
when the commercial power fails, my important lights, like the one over my desk right now, don't even flicker. They just stay on.
In addition, from my computer chair, there are two car stereos within arms reach. I can get AM & FM if I need a power outage news report. And I can also rock the casba whether the commercial power is on or not.

We don't have municipal water out here. So I've got a private well.
Thus I have a well pump. It's one half horsepower.
One horsepower is about 776 watts (various sources vary this number, but that's one common value).
By that standard my well pump probably draws less than 400 watts.
I'd like to get an inverter for my UPS, so I can take a shower, even if the commercial power is down for a week (it has already happened. That was a grungy week for me!).
I've got a back-up generator, but it's inconvenient to run for power failures of less than 6 hour duration.
I should probably get a propane-powered backup generator.
That would solve lots of problems.

And finally:
while I don't skimp:
- I've got a refrigerator (some of my neighbors don't, some of them are off the grid entirely)
- I've got a "Oversize Capacity Plus" Maytag clothes washer
- Various appliances, a cabinet saw, portable ("circular") saw, several computers, a TV, etc.

I'm judicious with it.
As a result my commercial electric bill is often under $30.oo / month.
The bill I paid yesterday was for $27.38

Oh yeah.
And though my computer is on 24/7 (it's a DVR in addition to everything else) it's a notebook. So even though I use it as a desktop, it's energy efficient. And though I use two monitors ("extended" mode), the second monitor, a UHD, it's small enough for my desk.
- design sensibly
- don't be wasteful
Quote:
"A penny saved is a penny earned." sometimes erroneously attributed to Benjamin Franklin
https://www.forbes.com/sites/realspi.../#1ab5d2f72e88
* & of course, they'd go out in a commercial power failure anyway.
My intended point is, when I shut off my power, it's DARK !!

PS
NOTE:
LED are quite sensitive to both over-voltage, and heat damage.
It may be better to under-drive an LED than over-drive it.
And keep it cool. Allow it air circulation. And if it has passive cooling, it wouldn't hurt to vacuum the heat dissipation surfaces occasionally. With MTBF ratings of 14 years or more, you might add a few years of useful life to it that way.
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Old August 3rd, 2017, 11:34 PM   #5
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Quote:
Originally Posted by Twisted Sister View Post
I just bought some this morning for only $2.25 per bulb. Life span is 13.7 years. They are 60W but look as bright as 100W. Estimated energy cost per year is $1.20. I bet they were made in China but I could care less as long as I get a reliable product. I think it was an Obama Mandate to get rid of incandescent household light bulbs. The box does not say if there are rare earth elements in them.
That is the kicker, we are saving X amount if energy per bulb but spending Y to ship it over from china. If examining the "energy crisis" from a global perspective is there truly a positive gain especially from the position of global warming/cooling?

That is not even taking into consideration the economic loss to the US


Isn't there a lightbulb in a SF lighthouse that has been burning nonstop since like 1910 or something?
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Old August 4th, 2017, 04:00 AM   #6
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Sc #5

Good point.
BUT !!

If these Chinese bulbs only had a 400 hr. useful life, your point would be near indisputable.
But an LED saves energy every minutes it's in use, for however many decades it lasts.
And in some installations (a light in a closet), the LED may long outlive the human that installed it.
Quote:
"Isn't there a lightbulb in a SF lighthouse that has been burning nonstop since like 1910 or something?" Sc
Perhaps.
The example that I read about was a light at a fire station. It's reportedly been burning non-stop for decades.
And the illustration of it showed it was an obvious antique.

In the 1970's I lived in an upstairs apartment. There was no upstairs window in the stairwell. So it was dark there whenever the light burned out. The landlord had a light there, but the light burned out quite frequently, leaving the stairwell dark.

I was married then, and didn't want my wife staggering around in the dark. So I went shopping. I found a U.S. source for European lightbulbs (neither the CFL nor the LED were commercially available for that application back then). [Then] West Germany was on a 220 VAC commercial power standard. So I bought one, with a higher wattage rating than the one it replaced, probably 100 watts or so.

BUT !!

It was running on an ostensible 110 VAC circuit (but I'm guessing was over that, due to frequent bulb burn-outs).

The bulb burned dimly; but bright enough to see possible trip hazards on the stairs, or gosh forbid a n'er-do-well hiding in a corner with a sharp instrument w/ evil intent. And it lasted for as long as I resided there; many many times longer than any other bulb there had lasted.
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Old August 4th, 2017, 08:52 AM   #7
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Quote:
Originally Posted by Twisted Sister View Post
I just bought some this morning for only $2.25 per bulb. Life span is 13.7 years. They are 60W but look as bright as 100W. Estimated energy cost per year is $1.20. I bet they were made in China but I could care less as long as I get a reliable product. I think it was an Obama Mandate to get rid of incandescent household light bulbs. The box does not say if there are rare earth elements in them.
Are you sure about those numbers TS? The LEDs I recently bought were 6 watt which were advertised and as far as I can visually judge the same as 60 W incandescents.
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Old August 4th, 2017, 09:39 AM   #8
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RG #7

It's understandably confusing RG.

a) TS posted that comment 6 months ago.

b) The LEDs TS bought may have been on the shelf a year or more.

c) The technology is advancing.
LEDs are being made more energy efficient.
And they're available in a variety of colors; designated in "degrees Kelvin".







The third is an example of the cooling fins I mentioned earlier. Keep your LEDs cool, and they'll keep you happy.
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