jrmcferren
Enlightened
Re: New Lightbulb!
There is another thread about it here: http://candlepowerforums.com/vb/showthread.php?t=192644
There is another thread about it here: http://candlepowerforums.com/vb/showthread.php?t=192644
Luxim Plasma Bulb Claims 140 Lumens/Watt
- Thread starter PhotonWrangler
- Start date
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PhotonWrangler
Flashaholic
Re: Is there a 400w LED?
Interesting... thanks, Tony. That 500w emitter comes out to 40lm/watt. While it's a good effort, I'll pass on that one.
Interesting... thanks, Tony. That 500w emitter comes out to 40lm/watt. While it's a good effort, I'll pass on that one.
DM51
Flashaholic
Re: New type of light? Maybe someday?
There is already a thread about this. I'm merging the two.
There is already a thread about this. I'm merging the two.
Mark620
Enlightened
- Joined
- Feb 22, 2006
- Messages
- 326
Re: Is there a 400w LED?
When will these be available for flashlight use?
When will these be available for flashlight use?
TorchBoy
Flashlight Enthusiast
Re: Is there a 400w LED?
Can someone explain why there's such a fuss about the article writer not knowing what they are writing about? As far as I can see, the worst anyone could claim is that the headline should say "... would blow away a 400W LED" since of course 400W LEDs don't exist. But... Gryloc's link shows they do exist. Well, 500W LEDs, anyway.
AFAIK headlines are often chosen by someone other than the writer, but even as it is, the 500W LED would indeed (sort of) be blown away by it. 35 klm vs 20 klm.
To say it would blow away a 400 W HID would be worse, since the bulb appears to be an HID bulb.
What else? There's an approximation that LEDs do 70 lm/W. They vary a tad, but it's a starting figure, at least.
In summary, I'd love to have one or two of these on the front of my car. For off road use, of course.
Can someone explain why there's such a fuss about the article writer not knowing what they are writing about? As far as I can see, the worst anyone could claim is that the headline should say "... would blow away a 400W LED" since of course 400W LEDs don't exist. But... Gryloc's link shows they do exist. Well, 500W LEDs, anyway.
AFAIK headlines are often chosen by someone other than the writer, but even as it is, the 500W LED would indeed (sort of) be blown away by it. 35 klm vs 20 klm.
To say it would blow away a 400 W HID would be worse, since the bulb appears to be an HID bulb.
What else? There's an approximation that LEDs do 70 lm/W. They vary a tad, but it's a starting figure, at least.
In summary, I'd love to have one or two of these on the front of my car. For off road use, of course.
Re: New Plasma LED
wow, so the UV output is actually quite low, that's good to know. I guess the more radiation that can be concentrated into the visible spectrum, the better the efficiency (or at least usefulness).
Still interested to know the RF spectrum output.
Fird
wow, so the UV output is actually quite low, that's good to know. I guess the more radiation that can be concentrated into the visible spectrum, the better the efficiency (or at least usefulness).
Still interested to know the RF spectrum output.
Fird
DM51
Flashaholic
Re: New Plasma LED
This is a plasma light source - it is incorrect to call it an LED, as they are quite different.
There have now been 3 threads on this - I am merging this one into the other 2.
It would be a great help if members would just take a quick look through the forum before starting a new thread - it is no good having several threads on the same subject. Please look for an existing thread before starting a new one.
This is a plasma light source - it is incorrect to call it an LED, as they are quite different.
There have now been 3 threads on this - I am merging this one into the other 2.
It would be a great help if members would just take a quick look through the forum before starting a new thread - it is no good having several threads on the same subject. Please look for an existing thread before starting a new one.
Re: New Plasma Lightbulb!
It doesnt scale down well at all (as you need a microwave source).
But it _could_ give Xenon a run for its money in the projector/ect buisness. Or any other application where you need a tiny source and a extreme brightness.
And for those things, "forced air cooling" is the very least of a problem.
It doesnt scale down well at all (as you need a microwave source).
But it _could_ give Xenon a run for its money in the projector/ect buisness. Or any other application where you need a tiny source and a extreme brightness.
And for those things, "forced air cooling" is the very least of a problem.
diff_lock2
Newly Enlightened
Re: Is there a 400w LED?
I just saw the vids now. Is the magnetic field changing (AC), I would expect it to be to heat up the metals inside the capsule.
If the interior is now plasma, and the magnetic field were to fail, wouldn't the capsule melt (plasma contact)? Releasing a small about of plasma (I don't want to see that kind of failure). Also, when you turn off this system, and the plasma cools down, do the elements/compounds REform?
I just saw the vids now. Is the magnetic field changing (AC), I would expect it to be to heat up the metals inside the capsule.
If the interior is now plasma, and the magnetic field were to fail, wouldn't the capsule melt (plasma contact)? Releasing a small about of plasma (I don't want to see that kind of failure). Also, when you turn off this system, and the plasma cools down, do the elements/compounds REform?
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PhotonWrangler
Flashaholic
Re: Is there a 400w LED?
The issue is that the actual comparison in the video was with a 400 watt HID streetlamp. Facts are facts and journalists have a duty to pay attention and get them right. Any technology writer who plays fast and loose with the facts has a serious credibility problem.
The issue is that the actual comparison in the video was with a 400 watt HID streetlamp. Facts are facts and journalists have a duty to pay attention and get them right. Any technology writer who plays fast and loose with the facts has a serious credibility problem.
eyeeatingfish
Enlightened
- Joined
- Apr 19, 2007
- Messages
- 920
Re: New Plasma LED
Is that at any temperature, or is that when it is run at 250 watts? Obviously we wont have 250 watt flashlights...
Is that at any temperature, or is that when it is run at 250 watts? Obviously we wont have 250 watt flashlights...
TorchBoy
Flashlight Enthusiast
Re: Is there a 400w LED?
Is that 140 lm/W figure the bulb itself, or the whole bulb/RF amplifier assembly? My guess is it's just the bulb, and (from memory) RF emitters are only 50% efficient at best. LEDs aren't dead yet.
Is that 140 lm/W figure the bulb itself, or the whole bulb/RF amplifier assembly? My guess is it's just the bulb, and (from memory) RF emitters are only 50% efficient at best. LEDs aren't dead yet.
Tachikoma
Enlightened
- Joined
- Apr 6, 2007
- Messages
- 487
Re: New Lightbulb!
You can also merge with this:
http://candlepowerforums.com/vb/showthread.php?t=192589
You can also merge with this:
http://candlepowerforums.com/vb/showthread.php?t=192589
zerogx2000
Newly Enlightened
- Joined
- Jun 21, 2007
- Messages
- 11
Ken_McE
Flashlight Enthusiast
- Joined
- Jun 16, 2003
- Messages
- 1,688
Silicon Valley's Luxim has developed a lightbulb the size of a Tic Tac that gives off a reported 140 lumens/watt. Don't know if that includes overhead for the power supply. Full spectrum, Argon gas plasma, runs at up to 6,000K, 20,000 hour life expectancy.
http://news.zdnet.com/2422-13568_22-192842.html
http://www.luxim.com/
MODS, it turns out that there are threads about this in general flashlight section. I thought it was grossly inapropriate for hand held lighting, but do what you think proper
The other threads:
https://www.candlepowerforums.com/threads/192852
https://www.candlepowerforums.com/threads/192622
https://www.candlepowerforums.com/threads/192589
https://www.candlepowerforums.com/threads/172881
http://news.zdnet.com/2422-13568_22-192842.html
http://www.luxim.com/
MODS, it turns out that there are threads about this in general flashlight section. I thought it was grossly inapropriate for hand held lighting, but do what you think proper
The other threads:
https://www.candlepowerforums.com/threads/192852
https://www.candlepowerforums.com/threads/192622
https://www.candlepowerforums.com/threads/192589
https://www.candlepowerforums.com/threads/172881
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yuandrew
Flashlight Enthusiast
I remember seeing a thread on the Luxim Plasma Lamp before back last September and you can actually buy these at Fry's electronics in the form of a Panasonic HDTV. Their "LiFi" series of rear projection TVs uses this light source.
https://www.candlepowerforums.com/threads/172881
Here's the PDF of what is inside the TV's light engine. Part of it looks the same as what is shown in the CNET video but there's more to it such as the microwave generator produces the RF needed to excite the gases inside the lamp. The benefit is that there are no electrodes to wear or burn out.
http://www.lifi.com/pdfs/TechBriefHowLIFIWorks.pdf
If you pay attention to the reflection in the background as the light is turned on, you'll see it turn blue for a second just before reaching full brightness. I looked into the back of the Panasonic LiFi TV while turning it on and the light also did turn blue right before hitting full brightness.
https://www.candlepowerforums.com/threads/172881
Here's the PDF of what is inside the TV's light engine. Part of it looks the same as what is shown in the CNET video but there's more to it such as the microwave generator produces the RF needed to excite the gases inside the lamp. The benefit is that there are no electrodes to wear or burn out.
http://www.lifi.com/pdfs/TechBriefHowLIFIWorks.pdf
If you pay attention to the reflection in the background as the light is turned on, you'll see it turn blue for a second just before reaching full brightness. I looked into the back of the Panasonic LiFi TV while turning it on and the light also did turn blue right before hitting full brightness.
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Re: New "LiFi" electrodeless HID lamp
Here is a video showing it gets 140 Lumuns/Watt vs high end LEDs which 70 Lumens/Watt. Enjoy!
http://news.zdnet.com/2422-13568_22-192842.html
Here is a video showing it gets 140 Lumuns/Watt vs high end LEDs which 70 Lumens/Watt. Enjoy!
http://news.zdnet.com/2422-13568_22-192842.html
TorchBoy
Flashlight Enthusiast
Re: New type of light? Maybe someday?
oo: It's a more educational thread now, and my apologies for saying it appeared to be HID.
On the sulfur-plasma link:
OK, so 30 or so Eneloop AAs and you'd have a run time of under quarter of an hour. But more than 30,000 lumens. That could throw...
I think you mean the other way around, but it means I now have to go back and read the whole thing again.
oo: It's a more educational thread now, and my apologies for saying it appeared to be HID.On the sulfur-plasma link:
The melting temp of quartz is much lower than the 6,000 K temperature mentioned for this new Tic Tac sized bulb. Is it kept cool in a similar way?
