Source: Tom's Guide US | Keywords: signal, cfl, hdr | Themes: Digital Cameras
9. CFLs: Enter the Hot Zone
The logical flaw in the whole “CFL mercury is the devil, so use incandescents!” argument is that incandescents burn more electricity, half of America’s electricity still comes from coal burning, and one byproduct of burning coal is the release of mercury into the atmosphere. According to the U.S. Geological Survey, only 35% of the released mercury is reclaimed by air pollution control devices. So if you have 8,000 hours of use from each type of bulb, the total mercury unleashed by a CFL is 1.2 mg from electricity use and 0.6 mg from landfilling (assuming no recycling). The incandescent bulb will account for 5.8 mg of mercury from its higher electricity use. And since we all know that many, many people will landfill their CFLs instead of properly recycling them, what would happen if nobody recycled their CFLs? “If all 290 million CFLs sold in 2007 were sent to a landfill (versus recycled, as a worst case),” notes the EPA, “they would add 0.16 metric tons, or 0.16 percent, to U.S. mercury emissions caused by humans.”
Clearly, the mercury case against CFLs on an environmental level is bogus. The net benefit from cutting overall electricity consumption is obvious, plus there’s a household benefit. Assuming you don’t break any and incur a $2,400 cleanup bill, the EPA estimates that the savings in electricity costs can total $50 per household per year.
And speaking of breaking CFLs, what if you break a bulb and have a household hot zone on your hands? First off, don’t touch the spill with your bare hands. Use disposable rubber gloves. Open up the area ASAP, leaving windows and doors open for at least 15 minutes and preferably for an hour while shutting off the area from the rest of the house. (Make sure the central heating/AC is turned off to prevent in-home circulation.) This step alone will eliminate most of the problem since mercury vapor is, uh, vapor and will dissipate into the surrounding environment. In fact, by the time the toxics specialist arrived at Bridges’s home, according to the Ellsworth article, “the air in the bedroom at the 3-foot level measured between 31 to 49 ng/m3 of mercury, depending on the location.” Keep in mind that 300 ng/m3 is the magic danger number.
With ventilation done, proceed to cleanup. Anything that touches the mercury-tinged glass will have to be sealed in a jar or plastic bag and thrown out. Use masking or duct tape, sticky side out, and pick up any small glass shards with it. The EPA says it’s then OK to vacuum the spill area provided you dispose of the vacuum bag in a sealed container. Clothes that come into contact with mercury vapor by proximity can be washed while clothes that actually touch the mercury spill should be discarded. And that’s about it. Don’t call for a HazMat crew. No need to max out your credit card for an in-house version of the Exxon Valdez clean-up. Just use your brain. You’ll likely get more mercury from eating certain fish than from being around a broken CFL.
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I have been able to improve the reception of my Samsung A-640. I was complaining at work one day about the poor cell coverage I experienced inside my home (usually only one or two bars), and at the time... I had no land line, so decent coverage was kindof important.
He told me to buy some wire, cut off a piece a 7 - 10 feet long, wrap as much as you can around the antenna in a tight coil (A-640 has an antenna that pulls out about two inches, so I extended the antenna and wrapped the wire around it), you then throw the other end of the wire up into a tree (or in my case... attach it to a hook in the ceiling)
I was able to get between one and two additional bars and I stopped dropping calls!
You really should try to avoid buying Rockstar energy drink. It's a company started by right wing talk show host Michael Savage, a notorious racist and homophobe who is, nonetheless very influential due to his syndicated radio show. He makes Rush look like a thoughtful person.
Great read as always.
You really should try to avoid buying Rockstar energy drink. It's a company started by right wing talk show host Michael Savage, a notorious racist and homophobe who is, nonetheless very influential due to his syndicated radio show. He makes Rush look like a thoughtful person.
Based on a few minutes of reading online, it seems the company that produces Rockstar is actually owned by Savage's son, Russell G. Weiner. Savage's wife is the CFO. Now, I definitely do NOT want to turn Tech Myths or Tom's Guide into a political debate forum. None of us are here for that purpose. That said, no, I definitely do not agree with most of Michael Savage's positions or statements. However, the only political similarities or cooperation I find between father and son were their founding of the Paul Revere Society in 1996, which had the mission of combating illegal immigration. I can find no other political, financial, religious, or any other link between them. I am not going to condemn the son, who openly supported California's Jerry Brown, for the father's views and actions. I'm sure there are plenty of us who strive not to emulate our parents, both internally and externally. Whatever reasons there are not to drink Rockstar, I don't believe Michael Savage is one of them. Can we go back to discussing technology now?
Since when did they sell Doritos in a can? I want some
"The five individual exposures were rendered in Photomatix Pro software in its Generate HDR Image mode."
Isn't that cheating
"The five individual exposures were rendered in Photomatix Pro software in its Generate HDR Image mode."Isn't that cheating
Not at all. The goal was to perform HDR imaging that ANYONE could do, not just owners of Photoshop or specialists with a ton of costly tools.
If you're trying to capture as much of the dynamic range as possible, start with exposure turned so there is plenty of detail in the shadows, but the rest of the image is overexposed, then gradually step up the exposure so that the highlights have detail but the rest of the image is underexposed. Seven exposures seems to be adequate, but more is better. HDR images shot this way or a mirror ball are often used in visual effects, because a quick mirror ball photo will give you the actual lighting from the scene you are placing effects into instead of having to approximate it in your 3d software.
you shouldn't drink energy drinks regardless of who makes them. $2 of sugar and chemicals. want energy? eat fruits and vegetables.
Now I haven't done any recent studies on radio wave frequencies and their interactions with materials, but it seems from what i remember that your can parabolas could actually STOP the microwaves going b/t the phone and tower. Metal is picky when it comes to absorbing or reflecting microwaves. This is why a fork will spark, and a CD will crizzle, but the inside of the oven is made of metal, which doesn't do either (because it configured to reflect). So this definitely seems like it COULD work, under ideal circumstances with ideal materials, but it's definitely hit or miss. Unsure why this seems to be so successful w/ wifi waves...maybe the short vs. long range wave strength is at fault.
Also to note: how many cell phones
are made out of aluminum -- wrapping a can part way around a phone seems to go directly against the design decision to avoid use of metal in the phones shell.
“Intensely amazing. But it has to be Photoshopped. I've lived near this bridge my entire life and the underbelly of it has always looked nasty-skanky. How did he get Cathedral Park to look so beautiful? It has to be fake....”
No, it’s not fake at all. In Wilson’s own words, here’s how he created the image: “While I am principally a Canon shooter professionally, I enjoy using my Pentax K20D with its complement of fixed focal length Limited series lenses for much of my personal work. In this photo, taken of the St. Johns Bridge just prior to official sunset, I used the 21mm set at f8 in a five shot auto exposure bracket with each exposure two stops apart in aperture priority. The five individual exposures were rendered in Photomatix Pro software in its Generate HDR Image mode. The resultant image was finalized in Topaz Adjust software.”
Topaz Adjust is a Photoshop Filter. So basically, your friend was right. It is Photoshopped. I don't think he was questioning whether it was a real picture. He just noticed that there were some image adjustments, which there definitely were.
He just noticed that there were some image adjustments, which there definitely were.
True, but if that's the attitude towards making any photo look more like how the human eye sees a subject, then many techniques result in fakes. You could say that many advancements in photography are fake adjustments, even if they're built into the camera, white balance comes to mind.
I don't understand why some people (generally speaking, not you Gutbop) get so upset when photographers use photoshop to enhance photos...especially when attempting to more realistically portray the subject.
True, but if that's the attitude towards making any photo look more like how the human eye sees a subject, then many techniques result in fakes. You could say that many advancements in photography are fake adjustments, even if they're built into the camera, white balance comes to mind. I don't understand why some people (generally speaking, not you Gutbop) get so upset when photographers use photoshop to enhance photos...especially when attempting to more realistically portray the subject.
Hey, I'm all about making things look pretty. My wife has a degree in Graphic Design, and she works at a photo studio doing their retouching, layouts, viewings, etc. I love the work she does.
I'm just saying... don't say something's not photoshopped when it is.
Interesting about the CFL bulbs.
Makes me wonder about the broken CFL bulb I saw in home depot when I was buying one -- still in its plastic box, but the thing was definately broken. I just left it behind & went along my way.
Interesting on the CFL Bulbs.
Makes me wonder about the broken one i saw at Home Depot a while back. It was still in its plastic box -- but definately broken.
Two things on the CFL's. First, when they do all those energy efficiency calculations, they never take into account the fact that in the process off adding heat they also heat up the room.
Yes in hot climates this is a minus but, when you live up near the Canadian border and it gets so cold outside in the winter you swear you can see the air start to liquefy, the cost of heating bills is way beyond others and these bulbs are actually about as efficient as most furnaces in heating a room so that heat isn't wasted and measurably reduces furnace run time.
Secondly, CFL fires aren't a fallacy. I've actually had one make a popping sound and ignite in an open mount in a ceiling fan in my kitchen. Did get the adrenaline up for the morning but coffee is a much safer wake up.
Talking about the benefits of using the heat from light bulbs just doesn't hack it. If these bulbs were as "efficient as most furnaces" at heating up rooms, then electric heating would cost far less than oil or gas and we all know that electric heating is by FAR much more expensive, which is why almost no one uses it in the northeast. Electric heating is used in the south more where there are many fewer heating days because the cost of installing electric heat is much less than using a furnace plus air ducts or boiler & baseboard.
Stick to the topic at hand - how efficient are the bulbs at generating *light*. LEDs are more efficient, but the cost, even though it has come down quite a bit, is still too high to be put to general use. A few more years though and LEDs will be the lighting of choice for almost all uses.
well, photography is quite part science and art. i'm more on the science part, to get accurate information/image since digital cameras for me still needs a lot of improvement.
breakage of CFL in my house is very rare and when it does in airy/open environment. my concern is which best type of lighting to use, which to me, is actually none. each type performs well for a function, incandescents for rare use, CFL for general use, and LEDs for long term/near 24 hour use.
The solution for CFLs is really simple: though still a bit expensive, we must move completely to LEDs as soon as we can. The long-term economy and practicity (you may not need to change a LED bulb your entire life!) are worth it.
Well, there is still the basic fact that color temperature, color rendering, and the basic mood of the lighting emitted by all current CFL and led lightbulb substitutes... well, it just plain sucks. I like and use cold cathode tube lighting in book lights and led lighting in pocket flashlights. I love them in those applications. The new Cree XRE Q4 5A emmitters even put out very nice light with great color rendering, but none of it holds a candle to the quality of light from bulbs such as the GE Reveal series of incandescent lights. Or decent halogen lighting for that matter. CFL's also suck in many outdoor bulb applications due to warm up time. You really don't want a motion sensor light to take time to warm up. Same goes for outside lighting on a switch for when something goes bump in the night. Not to mention, once again, the light quality sucks. Especially outside where the greater presence of browns and greens really brings out the low quality of the light.
Maybe I'm just selfish, but I frankly don't care enough about saving energy to put up with the atrocious light emitted by current CFL or led light bulb replacements. Sorry, but I just won't do it.
Now that said, it isn't as though flourescent lighting always sucks. Daylight toned tubular bulbs exist and make great interior area lighting. Painters use them to great effect. The still have the annoying 60hz pulse and most make audible noise that tungsten lighting does not in quiet environments, but they have their applications. Also, led tech gets better by the day. It may be in the next few years that leds can really rival tungsten lighting in color rendition. It won't be long after that when they become a viable alternative economically.
Until then, I don't care about the mercury, and damn my carbon footprint, I want some decent friggin light!