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Scientists Build a Better Incandescent Light Bulb… Six Years After Last US Factory Closes
CNS News ^
| April 22, 2016
| Barbara Hollingsworth
Posted on 04/25/2016 6:58:38 AM PDT by The_Victor
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To: babygene
Vacuum radio tubes ran cooler filaments than light bulbs; and, still evaporation from the filament deposited a black layer inside the glass. Argon gas reflects some of the lost tungsten back to the filament, and lengthens the light-bulb life accordingly; but, interferes with operation of a radio tube and is not used in that instance.
More efficiency is gained by substituting an iodine and krypton mixtures for argon. The iodine chemically combines with tungsten in cooler areas near the quartz envelope avoiding black deposits, and releases the tungsten to the filament, when exposed to the extreme heat of the filament. As the filament has enhanced protection, the filament is designed to run hotter for better color balance and efficiency.
To: arthurus
Every 1% over-voltage reduces bulb life by 10%.
To: originalbuckeye
I do like the soft LEDs, but they're so expensive. Not any more!
And they work in cold weather!!!
83
posted on
04/25/2016 8:36:15 PM PDT
by
Elsie
(Heck is where people, who don't believe in Gosh, think they are not going...)
To: babygene
about 3 decades ago, they found that they were much cheaper to manufacture, if instead of evacuating the bulb, they filled it with the inert gas Argon.How can something be 'cheaper' than nothing?
84
posted on
04/25/2016 8:38:56 PM PDT
by
Elsie
(Heck is where people, who don't believe in Gosh, think they are not going...)
To: babygene
The vacuum of course doesnt conduct heat, leaving it inside the bulb. Argon conducts the heat to the outside of the bulb, raising the temperature of the glass and wasting it into the environment.
WHAT???
85
posted on
04/25/2016 8:39:45 PM PDT
by
Elsie
(Heck is where people, who don't believe in Gosh, think they are not going...)
To: yefragetuwrabrumuy
The guys farming indoors are way ahead on that. Blue enhances leaf growth, and red encourages setting fruit. ;-)
To: The Great RJ
I often wonder how much Mercury was dumped into the environment by all those CFL bulbs. Probably no more than was taken out of it to begin with.
87
posted on
04/25/2016 8:41:03 PM PDT
by
Elsie
(Heck is where people, who don't believe in Gosh, think they are not going...)
To: Elsie
“How can something be ‘cheaper’ than nothing?”
Nature abhors a vacuum, so you must pay for it, big time!
88
posted on
04/25/2016 8:41:09 PM PDT
by
headsonpikes
(Mass murder and cannibalism are the twin sacraments of socialism - "Who-whom?"-Lenin)
To: headstamp 2
>> The CFLs are dangerous garbage
Notwithstanding the contradictory responses, I agree CFLs suck.
89
posted on
04/25/2016 8:41:15 PM PDT
by
Gene Eric
(Don't be a statist!)
To: arthurus
Some parts of the Earth have telluric electric currents which have been known to couple a DC bias into the power grid neutral/ ground connections.
To: DUMBGRUNT
Most homes have two hot legs of ~115v each, having too much load on one leg can cause flickering, when a large load is added or goes off. It's not imbalance that causes the blink, but the current surge which temporarily lowers the voltage available in your house.
The power coming into your house is not traveling thru resistance free wires. The wire is essentially a resistor and your total house load is one as well.
Use larger wire to supply your house will lessen the dip when things kick on.
My power company took out the old overhead wires to the house.
I got new underground wiring that could handle a LOT more current than the old over head stuff.
Blinking virtually vanished after that.
91
posted on
04/25/2016 8:47:58 PM PDT
by
Elsie
(Heck is where people, who don't believe in Gosh, think they are not going...)
To: TTFX
Computer screens are also implicated for sleep issues.
To: Elsie
“How can something be ‘cheaper’ than nothing?”
In this case it’s easy... argon does have a cost, however it’s much less expensive than the equipment and the time per bulb in evacuating the bulb.
93
posted on
04/25/2016 8:48:43 PM PDT
by
babygene
(Make America Great Again)
To: babygene
If you can maintain the temperature of the tungsten fulfillment without loosing as much heat to the atmosphere, then you can get the same light output without using 60W. So if I dip the glass part in a large bowl of water; it will get dimmer; right?
94
posted on
04/25/2016 8:50:07 PM PDT
by
Elsie
(Heck is where people, who don't believe in Gosh, think they are not going...)
To: yefragetuwrabrumuy
By increasing or decreasing the various light bands in the spectrum, he was able to manipulate plants to flower, bear fruit, and even change the gender of plants. Thus the lighting that will be in all of Target's bathrooms.
95
posted on
04/25/2016 8:51:03 PM PDT
by
Elsie
(Heck is where people, who don't believe in Gosh, think they are not going...)
To: DUMBGRUNT
Most of us here on the third planet out from the sun enjoy the solar radiation from across the vacuum that keeps us warm.NOW you've done it!
96
posted on
04/25/2016 8:51:56 PM PDT
by
Elsie
(Heck is where people, who don't believe in Gosh, think they are not going...)
To: chopperman
240 Ω at 2600 °K only.
To: The_Victor
I hate the new lights.
I wonder if there's a "black market" for the old incandescents...hmmmmm.....
Leni
98
posted on
04/25/2016 8:52:39 PM PDT
by
MinuteGal
(GO TRUMP GO !!!)
To: Ozark Tom
The plasma ones; yes.
The others?
Not so much.
99
posted on
04/25/2016 8:55:29 PM PDT
by
Elsie
(Heck is where people, who don't believe in Gosh, think they are not going...)
To: Ozark Tom
“Vacuum radio tubes ran cooler filaments than light bulbs; and, still evaporation from the filament deposited a black layer inside the glass. Argon gas reflects some of the lost tungsten back to the filament, and lengthens the light-bulb life accordingly; but, interferes with operation of a radio tube and is not used in that instance.”
That’s not correct. Radio tubes do not use argon or any other gas. The only exception to that are thyratron tubes and very old voltage regulator tubes. Normal vacuum tubes are evacuated to around 1X10 to the minus 5 torr, then a getter is fired to burn off and/ot trap any gasses that are left.
They run under a very hard vacuum. I know this because I’ve built them in my shop. The vacuum equipment is very expensive. You need a roughing pump and either a diffusion pump or a turbo vacuum pump.
Incandescent light bulbs do not require near as hard a vacuum BTW.
100
posted on
04/25/2016 9:05:42 PM PDT
by
babygene
(Make America Great Again)
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