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CFLs are produced for both alternating current ( AC ) and direct current ( DC ) input.
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CFLs and are
Although variable-voltage devices are used for various purposes, the term dimmer is generally reserved for those intended to control light output from resistive incandescent, halogen, and ( more recently ) compact fluorescent lights ( CFLs ) and light-emitting diodes ( LEDs ).
There are two types of CFLs: integrated and non-integrated lamps.
Since the resonant converter tends to stabilize lamp current ( and light produced ) over a range of input voltages, standard CFLs do not respond well in dimming applications and special lamps are required for dimming service.
DC CFLs are popular for use in recreational vehicles and off-the-grid housing.
There are various aid agency initiatives in developing countries to replace kerosene lamps, which have associated health and safety hazards, with CFLs powered by batteries, solar panels or wind generators.
CFLs and for
IKEA has recycling bins for compact fluorescent lamps ( CFLs ), energy saving bulbs and batteries.
In many countries, governments have established recycling schemes for CFLs and glass generally.
Color names used for modern CFLs and other tri-phosphor lamps vary between manufacturers, unlike the standardized names used with older halophosphate fluorescent lamps.
CFLs and .
Compared to general-service incandescent lamps giving the same amount of visible light, CFLs use one-fifth to one-third the electric power, and last eight to fifteen times longer.
Like all fluorescent lamps, CFLs contain mercury, which complicates their disposal.
CFLs radiate a spectral power distribution that is different from that of incandescent lamps.
Improved phosphor formulations have improved the perceived colour of the light emitted by CFLs, such that some sources rate the best " soft white " CFLs as subjectively similar in colour to standard incandescent lamps.
These lamps allow consumers to replace incandescent lamps easily with CFLs.
Integrated CFLs work well in many standard incandescent light fixtures, reducing the cost of converting to fluorescent.
Non-integrated CFLs have the ballast permanently installed in the luminaire, and only the lamp bulb is usually changed at its end of life.
CFLs in solar powered street lights, use solar panels mounted on the pole.
CFLs emit light from a mix of phosphors inside the bulb, each emitting one band of color.
For example, Sylvania's Daylight CFLs have a color temperature of 3, 500 K, while most other lamps called daylight have color temperatures of at least 5, 000 K.
are and produced
Again, the sufferings and disasters produced by any transgression against the commandment not to love are almost invariably associated in one way or another with childhood, with the figure of a child.
Notable in this category are the Jupiter and Thor intermediate range ballistic missiles, which have been successfully developed, produced, and deployed, but the relative importance of which has diminished with the increasing availability of the Atlas intercontinental ballistic missile.
Finished signs are produced by sliding the separate letter panels into channels of 0.025-in. aluminum, which may be mounted to various surfaces.
Simultaneously, males or drones are produced, mostly from the unfertilized eggs of workers, although a few may be produced by the queen.
Other theories of origin are compatible with the formulaic theory: Beowulf may contain a design for terror, and The Iliad may have a vast hysteron-proteron pattern answering to a ceramic pattern produced during the Geometric Period in pottery.
-- The results of microanalysis of tektites ( natural glasses of unknown origin ) for gallium and germanium have shown that these glasses are probably produced from terrestrial ( or less likely from lunar ) matter by impact of a celestial body.
In one-shot, the isocyanate, polyester or polyether resin, catalyst, and other additives are mixed directly and a foam is produced immediately.
Sizable amounts of soybean, coconut, and palm kernel oil -- seed oils that are produced primarily for food purposes -- also are used to make soaps, detergents, and paint resins.
But Mr. Bragg is a remarkably gifted conductor, and the results he has produced with his boys are generally superior.
In the majority of species of caecilians, the young are produced by vivipary.
The Brahmic family of alphabets used in India use a unique order based on phonology: The letters are arranged according to how and where they are produced in the mouth.
Almost all species have a tight cluster of leaves ( a rosette ), either at the base of the plant or at the end of a more-or-less woody stem ; the leaves are less often produced along the stem.
Only in a few cases are leaves produced along the length of the stem.
New catalog entries of the remaining 15, 000 American feature films produced between 1974 and present day are incorporated every year.
Six astatine isotopes, with mass numbers of 214 to 219, are present in nature as the products of various decay routes of heavier elements, but neither the most stable isotope of astatine ( with mass number 210 ) nor astatine-211 ( which is used in medicine ) is produced naturally.
Decoration is characterized by fine hatching, and contrasting colors are produced by the use of mineral-based paint on a chalky background.
The flowers are white to pale pink, diameter with five petals, produced singly or in pairs and appearing before the leaves in early spring.
He is reputed to have observed that when the lengths of vibrating strings are expressible as ratios of integers ( e. g. 2 to 3, 3 to 4 ), the tones produced will be harmonious.
Galileo wrote " Waves are produced by the vibrations of a sonorous body, which spread through the air, bringing to the tympanum of the ear a stimulus which the mind interprets as sound ", a remarkable statement that points to the beginnings of physiological and psychological acoustics.
Since in oral languages the elements of sound are for the most part produced linearly in time ( that is, in a word like cat the a sound comes after the c sound, and the t sound comes after that ), they can generally be easily written in a linear ( one-dimensional ) writing system such as an alphabet.
There are only a few aspects which are produced simultaneously, such as tone in some languages, or vowel and consonant harmony, and which are therefore not straightforward to write with an alphabet.
are and for
this is not so, for education offers all kinds of dividends, including how to pull the wool over a husband's eyes while you are having an affair with his wife.
If it were not for an old professor who made me read the classics I would have been stymied on what to do, and now I understand why they are classics ; ;
but four Eromonga women are more than a match for the strongest male that ever lived.
However, in recent decades, for what doubtless are multiple reasons, an unannounced but nonetheless readily observable shift has occurred in both facets of national activity.
Of greater importance, however, is the content of those programs, which have had and are having enormous consequences for the American people.
I have just asked these questions in the Pentagon, in the White House, in offices of key scientists across the country and aboard the submarines that prowl for months underwater, with neat rows of green launch tubes which contain Polaris missiles and which are affectionately known as `` Sherwood Forest ''.
Now we must become vague, for we are approaching one of the nation's most guarded secrets.
They are huge areas which have been swept by winds for so many centuries that there is no soil left, but only deep bare ridges fifty or sixty yards apart with ravines between them thirty or forty feet deep and the only thing that moves is a scuttling layer of sand.
Others are confined to vast reservations, and not only does the Australian government justifiably not wish them to be viewed as exhibits in a zoo, but on their reservations they are extremely fugitive, shunning camps, coming together only for corroborees at which their strange culture comes to its highest pitch -- which is very low indeed.
It seems that for Persia, and especially for this city, there are only two times: the glorious past and the corrupt, depressing, sterile present.
Often, too, the social institutions are housed in these pavilions and palaces and bridges, for these great structures are not simply `` historical monuments '' ; ;
In Persia, where practically speaking there are no museums or libraries or, for that matter, hardly any books, the twins run free.
These songs ( practically all Persian music, for that matter ) are limited to a range of two octaves.
We are desperately in the need of such invention, for man is still very much at the mercy of man.
This almost trivial example is nevertheless suggestive, for there are some elements in common between the antique fear that the days would get shorter and shorter and our present fear of war.
I think that we are here also talking of the kind of fear that a young boy has for a group of boys who are approaching at night along the streets of a large city.
Within this notion clarity is possible, but for us who are neither Greek nor Jansenist there is not such clarity.
It is therefore not surprising that they resist the lure of marriage and the trap of domesticity, for like cats they are determined not to tame their sexual energy.
They are full of contempt for the institution of matrimony.
The women who come to West Venice, having forsaken radicalism, are interested in living only for the moment, in being constantly on the move.
Among the recipients of the Nobel Prize for Literature more than half are practically unknown to readers of English.
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