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<blockquote data-quote="Bijela Rupa" data-source="post: 224786" data-attributes="member: 31615"><p>Vidi ovo:</p><p>Metal halide (MH) lamps do not achieve their full light output</p><p>immediately after starting. Rather, they require a period of time-1 to</p><p>15 minutes-to reach 90% of their full light output. This period is</p><p>called the <a href="http://www.lrc.rpi.edu/programs/nlpip/lightinganswers/mwmhl/restrikeTimes.asp#" target="_blank">warm-up</a></p><p>(or run-up) time. <strong>After a lamp has been on for a period of time and</strong></p><p><strong>then extinguished, it cannot be immediately turned back on. Before the</strong></p><p><strong>lamp can be turned back on, the <a href="http://www.lrc.rpi.edu/programs/nlpip/lightinganswers/mwmhl/restrikeTimes.asp#" target="_blank">arc tube</a> must have a chance to cool down or the lamp will not restart. This period of time is called the <a href="http://www.lrc.rpi.edu/programs/nlpip/lightinganswers/mwmhl/restrikeTimes.asp#" target="_blank">restrike time</a>.</strong></p><p>Restrike times for traditional probe-start MH lamps can take 15 minutes</p><p>or longer, but restrike times for pulse-start MH lamps are generally</p><p>much shorter (see Figure 4). According to manufacturers' literature,</p><p>restrike times for pulse-start MH lamps can be more than twice as fast</p><p>as for probe-start MH lamps.</p><p></p><p>Ovo podebljano je poenta. Kad nestrane struje i odmah dođe a ova se ne ohladi, struja fila lampu i ona jedva vidljivo svijetli, dakle ne hladi se, nema vremena da se ohladi.</p></blockquote><p></p>
[QUOTE="Bijela Rupa, post: 224786, member: 31615"] Vidi ovo: Metal halide (MH) lamps do not achieve their full light output immediately after starting. Rather, they require a period of time-1 to 15 minutes-to reach 90% of their full light output. This period is called the [URL="http://www.lrc.rpi.edu/programs/nlpip/lightinganswers/mwmhl/restrikeTimes.asp#"]warm-up[/URL] (or run-up) time. [B]After a lamp has been on for a period of time and then extinguished, it cannot be immediately turned back on. Before the lamp can be turned back on, the [URL="http://www.lrc.rpi.edu/programs/nlpip/lightinganswers/mwmhl/restrikeTimes.asp#"]arc tube[/URL] must have a chance to cool down or the lamp will not restart. This period of time is called the [URL="http://www.lrc.rpi.edu/programs/nlpip/lightinganswers/mwmhl/restrikeTimes.asp#"]restrike time[/URL].[/B] Restrike times for traditional probe-start MH lamps can take 15 minutes or longer, but restrike times for pulse-start MH lamps are generally much shorter (see Figure 4). According to manufacturers' literature, restrike times for pulse-start MH lamps can be more than twice as fast as for probe-start MH lamps. Ovo podebljano je poenta. Kad nestrane struje i odmah dođe a ova se ne ohladi, struja fila lampu i ona jedva vidljivo svijetli, dakle ne hladi se, nema vremena da se ohladi. [/QUOTE]
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