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A cool tungsten light bulb may be possible
sandia national laboratories ^
| 05/01/02
| James Gee, et al,
Posted on 05/02/2002 9:07:50 AM PDT by Bobber58
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This would raise the efficiency of an incandescent electric bulb from 5 percent to greater than 60 percent
1
posted on
05/02/2002 9:07:50 AM PDT
by
Bobber58
To: Bobber58
neato
2
posted on
05/02/2002 9:10:53 AM PDT
by
Mr. K
To: Bobber58
So my Barbi Easy Bake Oven will no longer work?
To: evolved_rage
That is the first thing I thought of, too.
4
posted on
05/02/2002 9:14:55 AM PDT
by
SarahW
To: Bobber58
What I'm particularly stoked about is the massive increase in efficiency of photovoltaic systems. That could finally make PV systems practical and cost-effective.
5
posted on
05/02/2002 9:15:48 AM PDT
by
mvpel
To: Bobber58
Hmmm . . . Now which will be better, cool tungsten light bulbs, or
cool LED light bulbs? Of the LED light bulbs, I've read that the bulbs will never burn out and you could, for instance, operate a bright flashlight continuously for a month before the batteries would need to be replaced. Now that's efficient! I've already seen these LED flashlights in some of the junk mail catalogs I get. The future is gonna be interesting.
To: mvpel
What I'm particularly stoked about is the massive increase in efficiency of photovoltaic systems. That could finally make PV systems practical and cost-effective. This is big news; and surely not good news for the Sheik of Araby.
To: *realscience
Check the
Bump List folders for articles related to and descriptions of the above topic(s) or for other topics of interest.
Comment #9 Removed by Moderator
To: Ancesthntr
Yes, quite literally, the sheik-heads could go pound sand.
Besides these ever increasing efficiencies,
if the carmakers are allowed to use high-pressure EFI{developed as far back as WW II & sat on by Sneakyman Inc. & his 7 little Sisters} each molecule of fuel would be surrounded in a tornadic field of air{93+% clean burn}, we could do without imported earth goo.
But, & oh what a big B U T T, you know who holds the slimy cards.
10
posted on
05/02/2002 10:34:46 AM PDT
by
norraad
To: Pinlighter
Well, that sounds promising. After all, they sell chips with millions of transistors on them for pennies a pop, and all this is is a latticework. ;-)
11
posted on
05/02/2002 5:49:09 PM PDT
by
mvpel
To: LibWhacker
I've got a headlamp for hiking that can use either an incandescent or an array of white LEDs. The LED array will go for 10x the amount of the incandescent bulb, but it is not as bright.
Still it is bright enough to see the trail just ahead of my feet and is not so bright that it makes seeing the stars harder.
To: LibWhacker
32 watt T8 fluorescent--85 to 95 lumens/watt
standard F40T12 cool white fluorescent--60-65 lumens/watt
compact fluorescents--low 30's to low 60's lumens per watt, usually 48-60
T3 tubular halogen--20 lumens/watt
white LED--15-19 lumens/watt
standard 100 watt incandescent--17 lumens/watt
incandescent night light bulb (7w)--6 lumens/watt
incandescent flashlight bulbs--dismal, less than 6 lumens/watt Current white LEDS can beat flashlight bulbs, match large incandescents, but don't come close to fluorescents. They cost much more than any of them.
To: Bobber58;tech_index;tech_index;
Mathlete;
Apple Pan Dowdy;
grundle;
beckett;
billorites...
To find all articles tagged or indexed using
tech_indexClick here: tech_index
To: LibWhacker
"I've already seen these LED flashlights in some of the junk mail catalogs I get." There are several online suppliers of LED flashligh bulbs. Until they come down from their current $30 price (or until batteries begin costing $10 each), these will be attractive only to survivalists and special purpose users. The same logic applies to special "energy saving" bulbs and the cost of electricity. It just ain't worth my while to buy a lightbulb that takes five or six years of energy savings to pay for itself.
To: Bobber58
Hey! Another great scientific advancement brought to us by the Muslim world. Oh wait...no it wasn't.
16
posted on
05/09/2002 9:22:07 AM PDT
by
Henk
To: Bobber58
"The work was performed with a photonic crystal operating in the mid-infrared range, but no theoretical or practical difficulties are known to exist to downsizing the structure into the visible light range.""So it hasn't ACTUALLY worked yet. But we're sure it will."
Wait and see.
To: who_would_fardels_bear
Who makes that headlamp? What's it cost? Where'd you buy it?
18
posted on
05/09/2002 9:48:15 AM PDT
by
Romulus
To: Harrison Bergeron
It just ain't worth my while . . . Mine either! One of the articles I read promised that ultimately we'd see a powerful but compact LED flashlight that would give you a month's worth of continuous service on a single AAA battery. That's what I'm holding out for! None of the LED flashlights I've looked at on the web so far come anywhere close to that. Twelve hours seems to be the norm.
I'm sorry I didn't bookmark it because I can't find it now, but right after posting that I actually found a big LED flashlight discussion forum on the web where all they talk about is LED flashlights: Where to get the best ones, where to get the best deals, uses for (and no one mentioned spelunking!), new developments in, etc., etc.
LED flashlights! Six months ago I'd never heard of 'em. And I definitely never heard of this cool tungsten stuff. I live in mortal fear that one day I'll wake up, 100-years old, and somebody will tell me that men landed on Mars twenty years ago. Like that poor old drooling centenarian I saw on tv once who couldn't believe we had landed on the moon.
To: LibWhacker
Gee golly that sound's interesting -- the discussion site about LED flashlights that is -- could you post it?
20
posted on
05/09/2002 10:42:08 AM PDT
by
bvw
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