29.12.2014
Very Bright UVA Black Light Illuminates florescent fishing line with minimal shadowing or brightening of the shoreline.
Uses Very Little Current The electronic controls used in the GlowMaxx blacklight draws minimal current while still providing a brilliant blacklight in the UVA spectrum. Splash Proof GlowMaxx is splash proof, so there is no need to remove the lights from their positions while running down the lake to your next fishing spot or during periods of heavy rain. Very Small Size GlowMaxx is small enough to stow away without taking up unnecessary room in a dry well. Warranty GlowMaxx offers a 90 day warranty against defects in workmanship or defective components.
Molto apprezzi per il vostri servizio professionale & piA? alto controllo di qualitA  standard, molto felice di conoscervi. This Landlite G8 Base dimmable LED Bulb is perfect replacement for halogen lamps used in Under Cabinet Lighting & Puck Light. Incandescent light sources, including older versions with tungsten and carbon filaments, as well as the newer, more advanced tungsten-halogen lamps, have been successfully employed as a highly reliable light source in optical microscopy for many decades and continue to be the one of the illumination mechanisms of choice for a variety of imaging modalities.
Several varieties of tungsten-halogen lamps are now the default incandescent illumination source (and are provided by the manufacturer) for most of the teaching and research-level microscopes marketed around the world. The first commercial incandescent lamps equipped with tungsten filaments were introduced in the early 1900s.
Tungsten-halogen lamps were first developed in the early 1960s by replacing the traditional glass bulb with a higher performance quartz envelope that was no longer spherical, but tubular in shape. As previously discussed, in traditional incandescent lamps, vaporized gaseous tungsten from the filament is transported through the vapor phase and continuously deposited on the inside walls of the glass bulb.
The halogen regenerative cycle can be dissected into three critical steps that are outlined in Figure 2.


The benefits of the halogen regenerative cycle include the ability to use smaller envelopes that are maintained in a clean, deposit-free condition during the life span of the lamp.
Early investigations revealed that the addition of fluoride salts to the vapor sealed inside tungsten-halogen lamps produced output with the highest level of visible wavelengths, and also deposited recycled tungsten on regions of the filament with higher temperatures. Tungsten-halogen incandescent lamps operate as thermal radiators, meaning that light is generated by heating a solid body (the filament) to a very high temperature. A significant portion of the electrical power consumed by incandescent tungsten wire filaments is output in the form of electromagnetic radiation spanning the wavelength region between 200 and 3000 nanometers. In the case of an ideal blackbody radiator, the perceived color temperature is equal to the true (measured) temperature of the radiator material. In summary, as incandescent radiators, tungsten-halogen lamps generate a continuous spectrum of light that ranges from the central ultraviolet through the visible and into the infrared wavelength regions (see Figures 1 and 3).
The photometric characteristics for evaluating the performance of light sources are somewhat unusual in that two systems of units exist in parallel to define the important variables associated with radiance and spectral output. Presented in Table 1 are electrical specifications, filament dimensions, typical life span, and the photometric output for several of the most popular tungsten-halogen lamps currently utilized in optical microscopy. A wide variety of tungsten-halogen lamp designs incorporate integral reflectors that serve to efficiently gather light wavefronts emitted by the lamp and direct them into the illumination system in an organized manner. Reflector lamps are generally connected to lamp holders with molybdenum pins projecting outwards from the rear of the reflector and mounted with ceramic covers. Tungsten-halogen reflectors are designed to either focus or collimate light emitted by the lamp, as illustrated in Figure 4.
If the entire spectrum of radiation emitted by the lamp is required, or in cases where infrared light is useful, metal reflectors or glass reflectors with a thin gold coat are the optimum choice.
The basic anatomy of a single-ended tungsten-halogen lamp commonly used for illumination in optical microscopy is illustrated in Figure 5.


The excessively high operating temperatures of tungsten-halogen lamps require substantially stronger and thicker transparent envelopes than conventional tungsten and carbon lamps. One of the critical factors in the fabrication of tungsten-halogen lamps is sealing the internal elements to isolate them from the external atmosphere. Because tungsten-halogen lamp fabrication technology is so well advanced at this point, the life of a typical lamp ends suddenly, usually upon powering up a cold lamp filament.
Tungsten-halogen lamps can be operated using power supplies with either direct or alternating current, but most research-level microscopy applications use direct current (DC) power supplies. Illustrated in Figure 6 is a typical 100-watt tungsten-halogen lamphouse used in transmitted light microscopy applications.
Davidson - National High Magnetic Field Laboratory, 1800 East Paul Dirac Dr., The Florida State University, Tallahassee, Florida, 32310. We currently offer two more styles in this light; one wired with battery clips, and the other wired with a cigarette lighter plug.
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