They mention that "A common cold cathode application is in neon signage and other locations where the ambient temperature is likely to drop well below freezing, The Clock Tower, Palace of Westminster (Big Ben) uses cold cathode lighting behind the clock faces where continual striking and failure to strike in cold weather would be less than ideal. Other examples include the thyratron, krytron, sprytron, and ignitron tubes. Large-scale cold cathode fluorescent lamps (CCFLs) have been produced in the past, and are still used today when shaped, long life linear light sources are required."
So if you buy a "GOOD" kit, the chances of it failing will be lower. LEDs will be brighter and possibly cleaner. If you buy a $30 eBay kit, your chances are higher..
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