preheat fluorescent lamp
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preheat fluorescent lamp
(′prē′hēt flu̇¦res·ənt ′lamp)
(electronics) A fluorescent lamp in which a manual switch or thermal starter is used to preheat the cathode for a few seconds before high voltage is applied to strike the mercury arc.
McGraw-Hill Dictionary of Architecture & Construction:
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preheat fluorescent lamp, switch-start fluorescent lamp
A fluorescent lamp in which the electrodes must be preheated in order to start the arc; the preheating is initiated by either a manual switch or an automatic-starting switch.
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