cedivad
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October 16, 2012, 04:42:41 PM |
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True.
And let's not forget that the incandescent bulb light is the most natural one that we can archive artificially.
That might be true for fluorescents, but it's not true of all technologies. A standard incandescent is limited by the fact that no filament material is capable of the ~5800K temperature needed to give the same black body spectrum as the sun. There's a lot more promise of getting a close to white light spectrum with something light LED lights than there is with incandescents. 1) true, i was just justifying the guys that have headaches due to that. 2) sure, i know how they work 3) ok, so? what's the radiation of the sun? that's the one we should copy, not set a arbitrary standard and try to achieve that. You said that incandescent bulb light was the most natural that we can achieve artificially. I'm disagreeing with you, I think we will be able to get closer to the natural solar spectrum with technologies other than incandescent bulbs. It has nothing to do with setting standards. I may be wrong, i based that statement on an article i readed long ago. As of now, i think that statement to still hold. Eventually, we will find a better alternative.
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My anger against what is wrong in the Bitcoin community is productive: Bitcointa.lk - Replace "Bitcointalk.org" with "Bitcointa.lk" in this url to see how this page looks like on a proper forum (Announcement Thread)Hashfast.org - Wiki for screwed customers
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Richy_T
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October 16, 2012, 04:46:32 PM |
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That might be true for fluorescents, but it's not true of all technologies. A standard incandescent is limited by the fact that no filament material is capable of the ~5800K temperature needed to give the same black body spectrum as the sun. There's a lot more promise of getting a close to white light spectrum with something light LED lights than there is with incandescents.
Actually, LEDs are quite tricky. A bog standard LED works by an electron moving from one well definied energy state to another, emitting light at a fixed frequency. LEDs are, by default, monochromatic. Producing one that fools the eye into thinking it is white is fairly non-trivial (though obviously accomplished). Getting one that would produce black-body type radiation (at least in the visible range) is more work still. With that said, I do believe LED or some as-yet-undiscovered technology is the future and that CFLs will be a historical curiosity in time.
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MrTeal
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October 16, 2012, 05:06:26 PM |
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That might be true for fluorescents, but it's not true of all technologies. A standard incandescent is limited by the fact that no filament material is capable of the ~5800K temperature needed to give the same black body spectrum as the sun. There's a lot more promise of getting a close to white light spectrum with something light LED lights than there is with incandescents.
Actually, LEDs are quite tricky. A bog standard LED works by an electron moving from one well definied energy state to another, emitting light at a fixed frequency. LEDs are, by default, monochromatic. Producing one that fools the eye into thinking it is white is fairly non-trivial (though obviously accomplished). Getting one that would produce black-body type radiation (at least in the visible range) is more work still. With that said, I do believe LED or some as-yet-undiscovered technology is the future and that CFLs will be a historical curiosity in time. Most standard white LEDs use a blue light and a phosphor to simulate white light, though most have a large dip around 500nm and an overabundance of blue. That's just an engineering problem though, and there's no reason a proper color balance can't be implemented through the use of new phosphor or supplementing the gap with smaller targeted dies in an array. A warm white LED with reinforcement around 500nm would actually be pretty close, and much better than even the hottest incandescent.
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kokojie
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October 16, 2012, 05:25:34 PM |
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That might be true for fluorescents, but it's not true of all technologies. A standard incandescent is limited by the fact that no filament material is capable of the ~5800K temperature needed to give the same black body spectrum as the sun. There's a lot more promise of getting a close to white light spectrum with something light LED lights than there is with incandescents.
Actually, LEDs are quite tricky. A bog standard LED works by an electron moving from one well definied energy state to another, emitting light at a fixed frequency. LEDs are, by default, monochromatic. Producing one that fools the eye into thinking it is white is fairly non-trivial (though obviously accomplished). Getting one that would produce black-body type radiation (at least in the visible range) is more work still. With that said, I do believe LED or some as-yet-undiscovered technology is the future and that CFLs will be a historical curiosity in time. Most standard white LEDs use a blue light and a phosphor to simulate white light, though most have a large dip around 500nm and an overabundance of blue. That's just an engineering problem though, and there's no reason a proper color balance can't be implemented through the use of new phosphor or supplementing the gap with smaller targeted dies in an array. A warm white LED with reinforcement around 500nm would actually be pretty close, and much better than even the hottest incandescent. You know how difficult it was to even get a blue light? the guy won a Nobel prize for getting a blue light on LED. It was widely accepted as impossible, until the guy did it.
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Richy_T
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October 16, 2012, 05:34:32 PM |
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Though to be honest, I don't know if we really want to simulate the sun's radiation with artificial light. In a few niche applications maybe but I think cooler light is probably friendlier for most uses, (possibly because it mimics the spectrum of fires?)
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MrTeal
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October 16, 2012, 05:59:03 PM |
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You know how difficult it was to even get a blue light? the guy won a Nobel prize for getting a blue light on LED. It was widely accepted as impossible, until the guy did it.
Got a source on that? Shuji Nakamura didn't win a Nobel Prize unless I've missed something lately. Also, don't get so defensive. I never said it was necessary to produce a single die with a white spectrum. You can use multiple different dies with different spectrums on one module to tune the color balance you want. Though to be honest, I don't know if we really want to simulate the sun's radiation with artificial light. In a few niche applications maybe but I think cooler light is probably friendlier for most uses, (possibly because it mimics the spectrum of fires?)
Redder light is generally referred to as warmer, while bluer light is considered cooler. It's kind of backwards.
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Richy_T
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October 16, 2012, 07:41:09 PM |
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Redder light is generally referred to as warmer, while bluer light is considered cooler. It's kind of backwards.
It took me a while to mentally reverse the frequency order of visible light. After all, infra-red is beyond red and it's hot so therefore more energy and higher frequency, right? Absolutely not
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film2240
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October 16, 2012, 09:35:32 PM |
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When I first heard it this morning in UK on The Inquirer news site,I thought,holy s*** the EU decides it wants to regulate the very components I want to use inside my PC now.Talk about getting into my personal business.What business is it how powerful my PC is to someone other than me (the regulators). If anything,people like me will simply hasten up their plans to migrate to a country outside EU to escape these ridiculous regs.They banned traditional lightbulbs (non-CFL/LED),then they restrict certain supplements and now they're trying to regulate how powerful my GPU is.I mean come on.Whats next? I'm just happy I started to realise (better late than never) how useful freedom can be (esp in Uk where we're all convinced that the more regs,the better.I mean sure we need some regs but not so damn many lol)
Even though I find all this downright bizzare,we can find ways around it,question is will they start checking everything we import into EU too?
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Richy_T
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October 16, 2012, 09:53:23 PM |
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When I first heard it this morning in UK on The Inquirer news site,I thought,holy s*** the EU decides it wants to regulate the very components I want to use inside my PC now.Talk about getting into my personal business.What business is it how powerful my PC is to someone other than me (the regulators). If anything,people like me will simply hasten up their plans to migrate to a country outside EU to escape these ridiculous regs.They banned traditional lightbulbs (non-CFL/LED),then they restrict certain supplements and now they're trying to regulate how powerful my GPU is.I mean come on.Whats next? I'm just happy I started to realise (better late than never) how useful freedom can be (esp in Uk where we're all convinced that the more regs,the better.I mean sure we need some regs but not so damn many lol)
Even though I find all this downright bizzare,we can find ways around it,question is will they start checking everything we import into EU too?
The unregulated high-tech computer industry has been amazingly successful. Just imagine how much better things will be now we have the helping hand of government to guide us.
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Littleshop
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October 17, 2012, 03:37:26 AM |
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Why would you support a complete ban on them? If people want to buy them, what's wrong with that?
It's a complete waste of energy. Better technology already exists, no reason to continue using them. For the vast majority of uses you are correct. I am still not for a total ban. There are some outlier uses where the incandescent bulb is the best choice. It is a shame that people will purchase them because of impressions of early or cheap CFL's that are no longer true. An education campaign would be a better idea then a ban. Someone earlier said that CFL's don't work well in the extreme cold. That is sort of true, but almost all of the quality ones will start in -40. They can take 5-10 mins to warm up to full brightness in extreme cold. If you only intermittently use the bulb then go incandescent but that is an extreme outlier use. Even in that use, if you had the CFL bulb on 24/7 it would use less power then an incandescent on 1/3 of the time and the CFL would be at full brightness as it was always on.
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myrkul
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October 17, 2012, 03:51:13 AM |
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I find it interesting that nobody has mentioned the toxicity of CFL bulbs, especially when compared to standard incandescent. Who'd have thunk that much mercury would be "green"?
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niko
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October 17, 2012, 03:57:51 AM |
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I find it interesting that nobody has mentioned the toxicity of CFL bulbs, especially when compared to standard incandescent. Who'd have thunk that much mercury would be "green"?
How much mercury is there in a CFL? Once you answer this question, put that answer in the context of other sources of mercury around you. Coal plants and fish, for example. Correct for the toxicity factor of organomercury vs. elemental mercury. Come back to us.
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They're there, in their room. Your mining rig is on fire, yet you're very calm.
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Littleshop
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October 17, 2012, 04:04:04 AM |
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I find it interesting that nobody has mentioned the toxicity of CFL bulbs, especially when compared to standard incandescent. Who'd have thunk that much mercury would be "green"?
I do not recommend eating CFL's. That is enough information for 99% of the population.
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dust
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October 17, 2012, 04:07:40 AM |
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Everyone is missing the most ridiculous part of the article: The EU wants to cap MEMORY BANDWIDTH, not just power consumption. The commission wants to stop dedicated graphics cards of group G7 from going above 320 GB/s - that is in theory a memory bus at 384-bit connected to memory operating at 6667 MHz or 512-bit with 5001 MHz. This is definitely within reach for the next generation graphics cards. Radeon HD 7970 GHz Edition currently has a bandwidth of 288 GB/s with a 384-bit memory bus and 6000 MHz memory. For notebooks the limit will be only 225 GB/s.
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justusranvier
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October 17, 2012, 04:14:50 AM |
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You know how difficult it was to even get a blue light? the guy won a Nobel prize for getting a blue light on LED. It was widely accepted as impossible, until the guy did it. I wonder how many people have died because of the invention of the blue LED. Those things are the worst thing to ever happen to the ergonomics of consumer electronics. Once they were commercially available manufacturers started putting them everywhere and devices inevitably get brought into bedrooms the result is subtle, but real, disruption in sleep which has a non-trivial effect on health.
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myrkul
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October 17, 2012, 04:34:04 AM |
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I find it interesting that nobody has mentioned the toxicity of CFL bulbs, especially when compared to standard incandescent. Who'd have thunk that much mercury would be "green"?
I do not recommend eating CFL's. That is enough information for 99% of the population. I think Snopes (as usual) does a fine job of examining the dangers (and relative lack thereof) of CFL bulbs: http://www.snopes.com/medical/toxins/cfl.aspBottom line, they need special disposal procedures, unlike incandescent bulbs. How much mercury is there in a CFL? Once you answer this question, put that answer in the context of other sources of mercury around you. Coal plants and fish, for example. Correct for the toxicity factor of organomercury vs. elemental mercury. Come back to us.
4-5 milligrams. How much is in an incandescent bulb? Yes, it's less than living next to a coal plant. Yes, the risk factor of having a CFL bulb is minimal. I have two burning in my bedroom right now, and 5 more in the living room. I'm just suggesting that maybe power consumption isn't the only factor we should be looking at to determine the "green-ness" of a bulb.
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Littleshop
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October 17, 2012, 04:40:58 AM |
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I find it interesting that nobody has mentioned the toxicity of CFL bulbs, especially when compared to standard incandescent. Who'd have thunk that much mercury would be "green"?
I do not recommend eating CFL's. That is enough information for 99% of the population. I think Snopes (as usual) does a fine job of examining the dangers (and relative lack thereof) of CFL bulbs: http://www.snopes.com/medical/toxins/cfl.aspBottom line, they need special disposal procedures, unlike incandescent bulbs. How much mercury is there in a CFL? Once you answer this question, put that answer in the context of other sources of mercury around you. Coal plants and fish, for example. Correct for the toxicity factor of organomercury vs. elemental mercury. Come back to us.
4-5 milligrams. How much is in an incandescent bulb? Yes, it's less than living next to a coal plant. Yes, the risk factor of having a CFL bulb is minimal. I have two burning in my bedroom right now, and 5 more in the living room. I'm just suggesting that maybe power consumption isn't the only factor we should be looking at to determine the "green-ness" of a bulb. I usually agree with snopes but they have let their lawyers alter their good judgement on this one. They are still making people fear a broken CFL. A broken CFL has less mercury then a TUNA SANDWICH. If you break one, clean it up manually not with a vacuum. Open the windows if you can, but do not fear.... If you ate 100% of the mercury in the bulb it is less then that sandwich.
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myrkul
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October 17, 2012, 04:47:17 AM |
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I usually agree with snopes but they have let their lawyers alter their good judgement on this one. They are still making people fear a broken CFL. A broken CFL has less mercury then a TUNA SANDWICH. If you break one, clean it up manually not with a vacuum. Open the windows if you can, but do not fear.... If you ate 100% of the mercury in the bulb it is less then that sandwich.
I was speaking more to this point: Like batteries, used CFLs need to be disposed at a toxic waste depot rather than tossed out with the ordinary household trash. Because mercury is cumulative, this poisonous element would add up if all the spent bulbs went into a landfill. Instead, the mercury in dead bulbs is reclaimed at such depots and recycled. But, yes, the rather involved clean-up procedures are a bit much.
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Littleshop
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October 17, 2012, 04:52:16 AM |
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Everyone is missing the most ridiculous part of the article: The EU wants to cap MEMORY BANDWIDTH, not just power consumption. The commission wants to stop dedicated graphics cards of group G7 from going above 320 GB/s - that is in theory a memory bus at 384-bit connected to memory operating at 6667 MHz or 512-bit with 5001 MHz. This is definitely within reach for the next generation graphics cards. Radeon HD 7970 GHz Edition currently has a bandwidth of 288 GB/s with a 384-bit memory bus and 6000 MHz memory. For notebooks the limit will be only 225 GB/s. No, they don't. In fact they EXEMPT cards with high memory bandwidths from this recommendation if they are in a high end system. "1.1.3. Category D desktop computers and integrated desktop computers meeting all of the following technical parameters are exempt from the requirements specified in points 1.1.1 and 1.1.2: (a) a minimum of six physical cores in the central processing unit (CPU); and (b) discrete GPU(s) providing total frame buffer bandwidths above 320 GB/s; and (c) a minimum 16GB of system memory; and (d) a PSU with a rated output power of at least 1000 W. "
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