The Lighting Handbook ZG

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Vydal: ZG Lighting Czech Republic s.r.o

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On account their high luminous effi- ciency and long service life, LED light sources in particular are dominating all applications. The new series special models for indoor and outdoor applications constitute excep- tion. Operating position Manufacturers specify the permitted oper- ating positions for their lamps. The key parameters lamps can essen- tially defined the following terms: Warm-up time Discharge lamps particular need between 30 seconds and several minutes warm up and output the full luminous flux. temperature curve may vary with the position. 105° 45° 30° h 105 30 admissible not admissible . Nevertheless, there are reasons why efficient conventional lamps should still used. Dimmability As well incandescent and halogen incandescent lamps, almost all fluorescent and compact fluorescent lamps can be dimmed required nowadays.96 The Lighting Handbook Properties conventional lamps Conventional lamps today are normally only used replacements. LED light sources can be switched and dimmed required. They can rightly viewed the light source of the future. Most manufacturers’ metal halide lamps continue to incompatible with dimming because dimming may have uncontrolled effects on lighting quality and lamp service life. For some metal halide lamps, only certain operating positions are allowed avoid unsta- ble operating states. Compact fluorescent lamps may usually used any operating position; however, important properties such the lumi­ nous flux vs. Some properties that have taken into account when working with these lamps are listed below. The output sodium vapour lamps and high-pressure mercury lamps can be restricted stages. It therefore the expertise the planner find the best possible light source for any lighting task. Re-start High-pressure discharge lamps need to cool down for several minutes before they can started again