A Super-Efficient Light Bulb 468
Chroniton writes with news of a Silicon Valley company, Luxim, that has developed a tiny, full-spectrum light bulb, based on a plasma of argon gas, that gives off as much light as a streetlight while using less power. The Tic Tac-sized bulb operates at temperatures up to 6000K and produces 140 lumens/watt, almost ten times as efficient as standard incandescent lamps, and twice the efficiency of high-end LEDs. The new bulbs also have a lifetime of 20,000 hours. There's no mention of mercury or other heavy metals, which pose a problem for compact fluorescents.
Re:Commercial use (Score:2, Interesting)
Where's the story? (Score:2, Interesting)
I know that a lot of the stories on here are ads in disguise, but this one isn't even hiding. I didn't realize that slashdot was an a linking to unabashed ads now.
Re:Not as low energy as you think (Score:4, Interesting)
Well they say in the video that it is almost 10 times as efficient in terms of Lumen's per watt (140 vs 15 for a normal bulb). I assume what you mean though is that the new argon bulb might not be able to run at lower powers. So if you just wanted a 60 Watt bulb equivalent, it might not be possible. Is that what you mean?
Re:Light pollution (Score:3, Interesting)
Switch streetlights to a 33% duty cycle with pseudo-random (or really random) timing and instantly reduce power use for street lighting by 66% AND allow people to actually see those mysterious lights in the sky the old Greek dudes were talking about. As a side benefit, studies have shown that crime actually goes DOWN when lights come on at random rather than staying on all the time.
Re:Full sun spectrum?? (Score:3, Interesting)
Hazardous UV. You get quite a sunburn like some welders.
Not good for the eyes either. All wasted energy too.
Re:Commercial use (Score:4, Interesting)
http://www.ecogeek.org/content/view/1466/74/ [ecogeek.org]
Street lights? (Score:4, Interesting)
Growing exotic plants indoors (Score:2, Interesting)
Re:Commercial use (Score:5, Interesting)
Perfect for my "rose" garden! (Score:0, Interesting)
Re:Light pollution (Score:4, Interesting)
Re:Light pollution (Score:2, Interesting)
The efficiency when turning on is likely less important than the power draw. If we accept that it's not really necessary to turn night into day, (that is, that grown-ups shouldn't need a nightlight) then having them dim at the beginning of their cycle isn't much of an issue. Those constraints suggest the cycle length will need to be on the long side. Of course, The lights in TFA (being so small) probably have a much faster start-up.
Not this again (Score:3, Interesting)
I wish people would challenge memes like these, because they're mostly bullshit crafted to stir up/reinforce discontent, in this case by the right-wing noise machine against "environmentalists", because that sells newspapers. /. post) are there for the hyper-paranoid, and apply just as much to the regular old-school fluorescent tubes (moreso, since they contain more mercury).
CFLs, like all fluorescent lights, do contain a miniscule amount of mercury (and I do mean miniscule; about 4 mg), but to call it a problem is to vastly overstate the dangers involved. If you break a bulb, you may want to open a window for a bit, but that's about it. The clean-up steps the EPA mentions on their website (mentioned in the linked
The "problem" is serious enough that if you have a large population that uses CFLs (like places where incandescents aren't allowed anymore), you want to encourage people to dispose of them safely rather than to just throw them with the rest of the trash, but even if the mercury does end up in the environment, it will be less mercury than has been prevented from getting out by its power savings (Wikipedia has this picture [wikipedia.org], which demonstrates the principle for coal plants, but the same thing applies to other types of power plants, except "green" ones like hydroelectric and wind energy; but again, this is only relevant if the bulbs are disposed of unsafely, which is illegal in many places that mandate their use).
Re:Not as low energy as you think (Score:3, Interesting)
http://en.wikipedia.org/wiki/Black_body [wikipedia.org]
http://en.wikipedia.org/wiki/Wien's_displacement_law [wikipedia.org]
http://en.wikipedia.org/wiki/Spectroscopy [wikipedia.org]
http://www.youtube.com/view_play_list?p=095393D5B42B2266&page=2 [youtube.com]
Anyhow, these new lights are a major breakthrough... If they can get them into the hands of the general public relatively quickly.
Re:Not as low energy as you think (Score:2, Interesting)
RF emitter? (Score:2, Interesting)
Re:Halving power usage of streetlights, easy. (Score:3, Interesting)
Re:Halving power usage of streetlights, easy. (Score:1, Interesting)
Sure you could, if your eyes were allowed to adjust for decent night vision. I've ridden my mountain bike through trails in the middle of the night after my eyes have adjusted. Now, I wouldn't do that down trails I wasn't already familiar with because it'd be easy to miss seeing branches when moving in the dark at 10-12mph, but it was no problem in the trails I was riding through.
Re:Short answer.... (Score:5, Interesting)
Time to add nimp.org to your hosts file [wikipedia.org]. The link is an auto redirect from rds.yahoo.com to members.on.nimp.org. This is how Yahoo redirects search results to find out who clicked what. Yawho? search results are thus no longer safe to click. For best results, add rds.yahoo.com to your hosts file or equivalent blocker as well.
members.on.nimp.org resolves to poulet0.zoy.org. The IP address is [80.65.228.130]. Best to block that as well. The DNS administrator for this server is Slashdot User "Sam H [slashdot.org]", UID 3979.
Somebody at slashdot should have a look at our anonymous coward's IP address. It would be nice if we could quit this nonsense. I hope this isn't some troll that bought a low UID in the auction.
And maybe some slashdotter in Paris [domaintools.com] could call Sam [zoy.org] and ask him to fix his compromised [netcraft.com] server [netcraft.com]. It does look like someone truly nasty took it over in August of 2005. Big Debian fan this one. Likes the GNAA routine and the whole bit.
I'm not certain about pinning this on Sam. sam.zoy.org resolves to a different IP. One of you intertubes wizards want to weigh in here?
Re:Light pollution (Score:3, Interesting)
I live on the 30th floor of an apartment building. One full block away, someone is using a 150 or 300 watt incandescent to light up their backyard. Unshielded of course. 50% of it's light is spilled directly into the sky. It's the brightest visible thing in the entire city, RUINS the entire view of the nighttime cityscape because it's so out of place, and at night casts such brightness on my ceiling that if I don't want to be kept awake by the light, I have to pull my curtains (which pisses me off, it's nice to wake up to sunlight in the morning, and it helps one to wake up). I can't imagine how peeved and angry at him all his neighbours are, the ones who live right next to him.
Furthermore, it's blinding. I can't see a fucking thing in his back yard. Someone could spend a half hour butchering him with an axe right in the middle of his back lawn, and I betcha NOBODY would see a fucking thing. I couldn't.
I really should print out this post and put it in his mailbox. (Hmmm, perhaps I should hit the "anon" button
White LEDs at 300 lumens per watt (Score:3, Interesting)
Re:Halving power usage of streetlights, easy. (Score:2, Interesting)
Only it doesn't work with nuclear and coal plants.
That's not what I wrote (Score:3, Interesting)
I missed your thread.
Certain aspects of this troll may be illegal in some jurisdictions. I don't know for sure - I'm not in law enforcement. It may not actually be a virus, but only a file that contains a signature. I'm not going to fire up a VM and infect it just to find out. Using Yahoo for URL obfuscation is interesting, though.
I also did not say that he is the actor here -- only that he's the DNS administrator for the server involved, and that novices shouldn't toy with such levels of uncertainty unless they accept the risks.
Sam Hocevar is a valuable member of the community. My initial concern was that this was some compromised server that should be fixed and then some curiosity about what was going on. If it happened that Sam got his amusement trolling the internet, well, I guess I could get over the inconvenience of blocking his site. Note that I'm not saying that this is the case -- just that if it were, then I'm no longer interested in the issue. I would think that someone with this level of skill would cover his tracks better if he cared to. Professional trolling can be an unpleasant but instructive laboratory in the field of social dynamics. I'm not interested enough in the field to engage in it myself, but as long as they keep it legal I don't have a problem with it.
Cmdr Taco does a good job of structuring Slashdot so these folks can be modded down quickly and disappear unless you're looking for them. In fact, we probably shouldn't be discussing the trolls at all. They thrive on the attention. That's all I've got to say about this.