Parameters can be divided into two main groups - the technical (physical) and operational, although some parameters of such a division is not unique, since it does not always possible to separate the technical parameters of performance, such as, for life. Let us consider briefly the main parameters of electric light sources, designed for lighting and exposure. Technical specifications. The most important of these are indicators of the radiation, the electric mode and the design parameters. Radiation is characterized by radiation flux (luminous flux) Fe (Fu), the distribution of the radiation spectrum of Fe (X), the radiation power of e (luminous intensity Iv), energy (light) the brightness of Le (Lv) and its distribution, as well as changes in these variables over time in work with alternating current. Light color bulbs further characterized color options: chromaticity coordinates x and y, color temperature and color rendering index Ttsv - general and special
Ra Rt (from 8 to 14), the color of a mercury arc lamp radiation is estimated so-called red ratio.
Electric power lamp mode is characterized by Pn, the operating voltage across the lamp U, supply voltage Un, current strength I and the species current (Constant, variable frequency F, etc.). Discharge lamps introduce additional power losses in the ballasts (ballast), lamp power coefficients k and lamp ballasts - coscp, current crest factor ki, a number of stresses associated with the ignition and extinction of the discharge, currents and other start-up mode design parameters. The design parameters of lamps include overall and mounting dimensions, the height of the luminous center, the size of emitting body, the shape of the bulb, its optical properties (transparent, frosted, zerkalizovannaya, etc.) and the vehicle or foot inputs, design and dimensions of electrodes and other operational parameters. The most important of They include efficiency, reliability, suitability to the conditions set source and, of course, cost. Efficiency, or net output, the source is determined, firstly, the energy conversion efficiency electrical energy into optical radiation and, secondly, the proportion of optical radiation energy is transformed into an effective energy of the receiver.
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