Cathodoluminescent lamps could be used in operating room decontamination, UV irradiation of throat and tonsils, and dental filling curing."Īnother important advantage of the new lamp over LEDs and fluorescent bulbs is that it does not rely on the so-called critical raw materials. "But medicine is different, because the issue of mercury lamp disposal at individual medical facilities has not been resolved, while the environmental standards are becoming stricter.
"Some industries using mercury lamps for water treatment and air disinfection, for example, will be very slow and unwilling to phase them out," commented Mikhail Danilkin of Lebedev Physical Institute, RAS. Credit: Image courtesy of the researchers Cathodoluminescent lamp: cathode modulator unit (1), cathode (2), modulator (3), emitted electrons (4), phosphor (5), aluminum mirror serving as anode (6), anode output (7), glass vacuum tube (8). Cathodoluminescent UV light bulbs contain no mercury and are generally cleaner in service and upon disposal.įigure 1. Among other products, the ban targets ultraviolet fluorescent tubes, widely used for greenhouse lighting and other applications. Novel ultraviolet light bulbs would be a particularly timely development, considering the recent ban on household appliances using mercury under the Minamata Convention, a United Nations treaty signed by 128 countries that came into effect in August 2017. This electron bombardment results in light.Ĭathodoluminescent lamps have the advantage of emitting light almost at any wavelength, from red to ultraviolet, depending on which fluorescent material is used. A potential difference of up to 10 kilovolts accelerates the emitted electrons toward a flat positively charged phosphor-coated electrode-the anode-at the opposite end of the tube.
#Cathode light tube tv
Shown in figure 1, a lamp of this kind relies on the same principle that powered TV cathode-ray tubes: A negatively charged electrode, or cathode, at one end of a vacuum tube serves as an electron gun. Since the 1980s, engineers around the world have been looking into the so-called cathodoluminescent lamps as another option for general lighting purposes. Shop here and c hoose the energy-efficient, long-lasting shape which best meet your unique lighting needs.While LED lamps have become commonplace, they are not the only clean and power-saving alternative to incandescent lamps. On such systems, small amounts of electricity continuously enter the bulbs, even when turned off, diminishing the life of a Cold Cathode or CFL. And finally, Cold Cathode and CFLs do not work well if used with timers, motion detectors, or photo sensors are used. Cold Cathodes tend to cost more than CFL for comparable uses. Compare that to the range of a traditional CFL – Upwards past 150 watts comparable incandescent and over 2850 initial lumens. Occasionally, you might see one brigher, up to 60 or 75 watts.) Initial lumens range from 100 to 300. What are the disadvantages of Cold Cathode Fluorescent Light Bulbs? Cold Cathodes are restricted in light output, reaching only up to 40 watts comparable incandescent. The extended life reduces the maintenance cost and hassle of replacing the lamps.
That is over 15,000 hours longer than most CFLs. And, Cold Cathodes last for approximately 25,000 hours of use. They are available in all common shapes, including a-lamps, flame tips, torpedo, G20 globes, G25 globes, G30 globes, R20 floodlights, R30 floodlights, and flat pars.ĭimmable down to 5% of total light output, Cold Cathodes provide more flexibility than CFLs. What are the advantages of Cold Cathode Fluorescent Light Bulbs? Cold Cathodes are ideal for use in theaters, amusement parks, marquees, flashing signs, chandeliers, decorative applications, sanctuaries, down lighting and track lights. Cold cathodes use more robust solid metal stubs which max out at 200 degrees Fahrenheit – hence the relatively “cold” cathode. In traditional CFLs, the cathodes incorporate thin tungsten wires which can reach upwards to 900 degrees Fahrenheit. The current then reacts with mercury and phosphors to generate ultraviolet light. So what is a Cold Cathode Fluorescent Light Bulb? CCFL, like their cousins Compact Fluorescent Lamps (CFL), use small, integrated ballasts to regulate electric current into a glass tube. Cold Cathode Fluorescent Lamps (CCFL), for instance, are especially useful where dimming, rapid on/off (for signs), or long lamp life is required. Tags: CCFL, CFL, cold cathode light bulbs, compact fluorescent light bulbsĪ light bulb is a light bulb is a light bulb – right? Wrong! There are certain types of light bulbs (or lamps as they are known in the lighting industry) which meet specific needs. What is a Cold Cathode Light Bulb? DecemPosted by bowmanlamps in Cold Cathode.
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