Fluorescent ballast within the -40 (continuous temperature) can work normally. However the fluorescent tube at -40 degrees can’t start.
The fluorescent tube is evacuated, then full of a small amount of inert gas and mercury, the interior wall of the tube is coated with a layer of
fluorescent powder. At both sides with preheating tungsten, tungsten coated with barium and strontium can due to the heat emission
of electrons.
emission free electrons, starter disconnects instantaneous high voltage between your electrodes at both sides, ionizing inert gas arc is
created between your tube (the lamp lit, we called it” startor”), the starting temperature increased after lamp, mercury heated and
gasified, mercury vapor ionization conductive, the arc is maintained, produce ultraviolet light, ultraviolet light tube fluorescent
material emits visible light. The ambient temperatures are too low in mercury lamp is difficultto be ionized, therefore it can’t start.