Are compact fluorescent light bulbs really eco-wise?
Or will we be sorry (with irreversible damage) ten years later for mercury poisoning everything? What is better in the seventh generation school of thought, incandescent, sodium vapor, halogen, or mercury vapor/ CFL’s?
Compact fluorescent light bulbs, right now, are more ” eco-wise” then anything else most consumers can get a hold of (ie. incandescent) and currently save over 2000 times their own weight in greenhouse gases.
But since my house is completely on solar / wind and we REALLY need to watch usage, every light is fitted with screw type (typical 110v lamp socket style) LED bulbs. They emit the same luminosity (typically 45) but at only 1watt rather then a 45w compact or 10w CFL. However they usually cost twice as much as CFLs which is twice as much (or more) as compacts. Still LEDs would be the way to go by far.
As for the second part of your question…
Mercury IS the lesser of the evils, without getting toooo elaborate discussing specifics (ie. which burns ozone faster, other layer’s besides ozone, disposing locations, methods, wind conditions, etc), one needs less mercury gas then most others, to obtain the same luminosity in a vacuum because of mercury’s longer agitated spectral wavelength. Mercury’s wavelength is more blue which is a longer more “luminous” or brighter light to say sodium, which is a more light orange or shorter less bright (red being the shortest) wavelength. so you’d need more sodium or other, in the tube or more electricity to the tube, to create the same luminosity as mercury.
so mercury wins out only because the sheer volume needed is less then the others.
Hope this helped,
Dan Martin
Retired Boeing Engineer now living 100% Off-the-Grid with my family, using Alternative Energy & loving every minute.
for more info visit www.agua-luna.com
Soco – EcoWise
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