本帖最後由 Quest 於 2011-7-19 07:03 編輯
Oh yeah, same old BSing from boss2007 again, loads of unsubstantiated claims and no real facts.
Also: most of the links to internets are just non-factual.
Fact: most Asian countries, incl. Jpn, has been using fluorescent lightings since the 50s, no reports on ill health reporting from them.
Fact: granted, if a CFL can last 8000hrs using only a quarter of the power of a standard tungsten filament lightbulb (which is known to have around 6~8% energy conversion efficiency, while the rest are being converted to heat, and typically comes with nominal service life of 1000 to 1500hrs), then throughout the use of 8000hrs, the mercury content from CFL(taking on the aspect of landfilling, which is approx. 0.6mg +1.2mg from coal-firing electricity plant), would be waay less than that mercury emissions associated to coal-firing electrical plant for powering that same type of filament lightbulb -->5.8mg). see ref below:
Ref: http://www.epa.gov/cfl/
ref: (Quoted from Wiki site): http://en.wikipedia.org/wiki/Compact_fluorescent_lamp
Environmental issues[edit] Mercury contentCFLs, like all fluorescent lamps, contain mercury[46][47] as vapor inside the glass tubing. Most CFLs contain 3–5 mg per bulb, with the eco-friendly bulbs containing as little as 1 mg.[48][49] Because mercury is poisonous, even these small amounts are a concern for landfills and waste incinerators where the mercury from lamps may be released and contribute to air and water pollution. In the U.S., lighting manufacturer members of the National Electrical Manufacturers Association (NEMA) have voluntarily capped the amount of mercury used in CFLs.[50] In the EU the same cap is required by the RoHS law.
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.[51][52] 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.[53] 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).[54]
The EPA updated their mercury comparison graph in November 2010. The graph assumes that CFLs last an average of 8000 hours regardless of manufacturer and premature breakage. In areas where coal is not used to produce energy, the content emissions would be less than the power plant emissions for both types of bulb. [55]
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Yeah, you can claim anything you want but fluorescent lighting technologies have been with us for over 80+ years, and it wasn't until recently that the spark of these CFL concerns become eminent? (I laughed my heads off on most of these myths and urban legends).
The development of CFL has to do mainly for the sake/ease of retrofitting most E26 Edison type (screw based) filament lighting systems, without the need of addition external electronics.
While most of you may have experienced less than reported service life on most CFLs avail (blame it all on low quality electronic components from china), typically around 1300 to no more than 2000hrs typical, certain brands such as the high end Philips Marathon or FEIT, DO USE HIGH QUALITY components and they can last over 6000hrs easily ( I have a pair of PAR-30 FEIT that's been running on-and-off for 5+yrs now, still works every nite).
Mind you: a mercury thermometer contains between 500 ~1000mgs worth of mercury within, as compared to 5mg (typical) or 2mg (low mercury type) CFLs, so, what is the point here...
And the association with phenols, flickering (CFLs run on very high freq., as opposed to the older magnetic ballast type which flickers around 60/50Hz), are equally unfounded.
filament lighting is on it's way out, and CFL and the likes shall remain with us for a few more decades before LED technologies become mature enough to take on the market full-force.
Also: even with Canada, starting late last year (believe it was Oct, 2010), gradually improving typically low-efficiency filament lightbulb by going with Halogen type with reduced wattage (around 46watts halogen equivalent to 60watts standard filament type), and Canada is also on it's way to phase out older AC 120V filament light bulbs entirely (except automobile type).
Q.
p.s. yes, I have 26 pot lights in my house, all of them already converted to CFLs. I have more concerns over my children's health and well-being than most LYKs here and am I worry about mercury to my kids? yeah! am I worry about CFL breakage causing mercury poisioning to my kids?! not in a million years (I'm careful when handling/disposing CFLs, besides: Ikea and a few other places do have CFL recycling facilities avail for dropoffs).
Also: I retro'ed a lot of my 2000hrs typ. CFLs to run over 8,000~10,000hrs, or until the filament inside the tube burns out. So, I'm getting more mileage out of my CFLs to make it worth my while than most of you folks.
I'm also an active member in EconReno boards alongside with many techno discussion folks....bust my myth if you want... |
發表於 2011-5-21 22:19
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. Not a competition here, so winner doesn't get a trophy.