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Old 10-13-2011, 05:29 PM   #31
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How to - get a better color/Light from CFL bulbs


For those of you complaining about warm up time, if you have a lot of lights on a single switch, like recessed lights in a hall or kitchen, use one incandescent and the rest CFL. That way you get instant light to see, and in a minute the room will be fully lit.

I have not tried this with a dimmer, not sure if it would work. But it works great in my kitchen and hall with a regular switch.

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Old 10-13-2011, 06:35 PM   #32
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How to - get a better color/Light from CFL bulbs


I am not sure the LED will be the holy grail of lighting either and may be one of those 8-track tape technologies that has its brief moment. It is disappointing that it is not coming down in price nor getting much brighter very fast although some of the long florescent tube replacement arrays are somewhat promising---especially those that eliminate the need for ballasts. The color rendering is getting better.

Let's not forget though that because of the mercury content CFLs will be banned at some point. Two many such things along with switches from cars with mercury, medical devices, thermometers and so forth are not being properly recycled and end up landfilled. The small amount contained in CFLs my seem inconsequential but start multiplying by the millions. It is highly toxic and dangerous and readily absorbed at the cellular level.

The photo of a person who stepped on a broken CFL February 2011 is probably an extreme example of acute mercury poisoning and no doubt there is some other active infection going on and someone probably postponed getting care but it gives you an idea of the potential damage and how fast it can occur even if taken in through an open wound and not ingested. Reducing mercury in the environment is not just another tree hugger cause.



Mercury exists naturally as a semi-liquid so flows like water. It was used in dental amalgams and is appearing in higher and higher quantities in things we eat, especially fish subjected, the theory goes, to its increase run-off from landfills into rivers, oceans and other water supplies.

Many hardware, lighting and box stores have CFL recycling bins. Some municipalities have annual events as well. Learning to handle spills in your home to protect you, your family and pets.

Last edited by user1007; 10-13-2011 at 07:07 PM.
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Old 10-13-2011, 06:58 PM   #33
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How to - get a better color/Light from CFL bulbs


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Originally Posted by sdsester View Post
Random things...

6500K is the recommended color temperature setting for computer monitors and the standard most manufacturers use for their online color tools. Bulbs in this color range are not bad for most applications.
I forgot to mention that the K color chart Scuba Dave published is one of my faves for showing the base color of light "as you look at it."

Almost more important is the Color Rendering Index of a light source. Incandescents and halogens like we use in gallery lighting have relatively low K temperatures but if you stick an apple or your mother in law under them they look rather natural because the light emits color across a broad spectrum.

On the other hand, we all remember flourescents with much higher K temps even into the daylight range (eg. plant lights) but that made people and things look blue or green. This is because they are not emitting a full spectrum of light.

http://www.lowel.com/edu/color_tempe...mystified.html

Even at box stores you can get CFLs in 6500K and with CRI indexes above 95 percent as used by photographers, printers, etc. These are marketed as full spectrum bulbs. For any bulb, you want a pleasant K temperature (and don't mix them up too much) and a CRI of 90 or higher. Your lighting or electrical supply store will have your best options.

Last edited by user1007; 10-13-2011 at 08:50 PM. Reason: Added URL
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Old 10-13-2011, 09:53 PM   #34
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How to - get a better color/Light from CFL bulbs


Quote:
Originally Posted by sdsester View Post
I am not sure the LED will be the holy grail of lighting either and may be one of those 8-track tape technologies that has its brief moment. It is disappointing that it is not coming down in price nor getting much brighter very fast although some of the long florescent tube replacement arrays are somewhat promising---especially those that eliminate the need for ballasts. The color rendering is getting better.

Let's not forget though that because of the mercury content CFLs will be banned at some point. Two many such things along with switches from cars with mercury, medical devices, thermometers and so forth are not being properly recycled and end up landfilled. The small amount contained in CFLs my seem inconsequential but start multiplying by the millions. It is highly toxic and dangerous and readily absorbed at the cellular level.

The photo of a person who stepped on a broken CFL February 2011 is probably an extreme example of acute mercury poisoning and no doubt there is some other active infection going on and someone probably postponed getting care but it gives you an idea of the potential damage and how fast it can occur even if taken in through an open wound and not ingested. Reducing mercury in the environment is not just another tree hugger cause.



Mercury exists naturally as a semi-liquid so flows like water. It was used in dental amalgams and is appearing in higher and higher quantities in things we eat, especially fish subjected, the theory goes, to its increase run-off from landfills into rivers, oceans and other water supplies.

Many hardware, lighting and box stores have CFL recycling bins. Some municipalities have annual events as well. Learning to handle spills in your home to protect you, your family and pets.
You really need to check the source on stuff like that. I believe I found one of the sources of the pics....it looks like someone took photos from something else and tried to blame it on mecury.

THAT is NOT a mecury poisoning injury....mecury is a neuro toxin.....

Those photos are typical of the mis-information people spread to create false fears.

I don't disagree that CFL's contain mecury...but the hazard is not nearly as bad as some would make it out. If you that worried, then I would suggest that you stop eating all tuna right now. It has a better chance of hurting you than a CFL does.
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Old 10-14-2011, 02:43 AM   #35
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How to - get a better color/Light from CFL bulbs


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THAT is NOT a mecury poisoning injury....mecury is a neuro toxin.....
Careful now. Whether mercury is strictly a neuro toxin depends on its form. Look up acrodynia (effects mainly children) and cutaneous granulomas which can be caused by walking on a broken thermometer or bulb as just two of the diseases or syndromes that come from mercury contact.

No matter really. My points stand that CFLs will be outlawed, probably in the near future. We need to recycle them safely in the meantime. And all of us should no how to clean up after one should break starting with never vacuuming up a broken flourescent bulb.

http://des.nh.gov/organization/commi...mp_cleanup.pdf

Last edited by user1007; 10-14-2011 at 03:18 AM. Reason: Added Cleanup URL
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Old 10-14-2011, 07:29 AM   #36
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How to - get a better color/Light from CFL bulbs


Quote:
Originally Posted by sdsester View Post
Careful now. Whether mercury is strictly a neuro toxin depends on its form. Look up acrodynia (effects mainly children) and cutaneous granulomas which can be caused by walking on a broken thermometer or bulb as just two of the diseases or syndromes that come from mercury contact.

No matter really. My points stand that CFLs will be outlawed, probably in the near future. We need to recycle them safely in the meantime. And all of us should no how to clean up after one should break starting with never vacuuming up a broken flourescent bulb.

http://des.nh.gov/organization/commi...mp_cleanup.pdf
Yea....we have all seen the dooms day posts on the evils of mecury in CFL's......like most everything else, there are two sides to the story....and then the truth.

The truth?

Those pics above have nothing to do with someone stepping on a broken CFL bulb.

Acrodynia:....according to Wikipedia...
Quote:
Mercury poisoning (also known as hydrargyria or mercurialism) is a disease caused by exposure to mercury or its compounds. Mercury (chemical symbol Hg) is a heavy metal occurring in several forms, all of which can produce toxic effects in high enough doses. Its zero oxidation state Hg0 exists as vapor or as liquid metal, its mercurous state Hg+ exists as inorganic salts, and its mercuric state Hg2+ may form either inorganic salts or organomercury compounds; the three groups vary in effects. Toxic effects include damage to the brain, kidney, and lungs.[1] Mercury poisoning can result in several diseases, including acrodynia (pink disease)[2], Hunter-Russell syndrome, and Minamata disease.[3]
Symptoms typically include sensory impairment (vision, hearing, speech), disturbed sensation and a lack of coordination. The type and degree of symptoms exhibited depend upon the individual toxin, the dose, and the method and duration of exposure.
Those pics you posted are not mecury related.....

The truth is, in overall net mecury exposure, a CFL reduces it....basically, when you look at the 'totoal' mecury put into our enviornment as compared to an incandescent....the incandescent is more poluting....why? Because a majority of our electricity comes from coal plants...burning coal releases mecury into the air.

Total mecury?
CFL = 1.2 mg (.6 bulb, .6 power)
Incandescent = 5.8 mg mecury....all from power.

Quote:
In areas with coal-fired power stations, the use of CFLs saves on mercury emissions when compared to the use of incandescent bulbs. This is due to the reduced electrical power demand, reducing in turn the amount of mercury released by coal as it is burned.[49][50] In July 2008 the U.S. EPA published a data sheet stating that the net system emission of mercury for CFL lighting was lower than for incandescent lighting of comparable lumen output. This was based on the average rate of mercury emission for U.S. electricity production and average estimated escape of mercury from a CFL put into a landfill.[51] Coal-fired plants also emit other heavy metals, sulphur, and carbon dioxide.

Net mercury emissions for CFL and incandescent lamps, based on EPA FAQ sheet, assuming average U.S. emission of 0.012 mg of mercury per kilowatt-hour and 14% of CFL mercury contents escapes to environment after land fill disposal.


In the United States, the U.S. Environmental Protection Agency estimated that if all 270 million compact fluorescent lamps sold in 2007 were sent to landfill sites, that this would represent around 0.13 metric tons, or 0.1% of all U.S. emissions of mercury (around 104 metric tons that year).[52]
So....to summerize....those pics you posted have nothing to do with mecury in a CFL bulb and CFL's are not going to be outlawed any time soon.


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