– According to the manufacturer, our nixie tubes have more than 5,000 hours of life time. Since nixie tubes in our watches are not permanently kept turned on and are only shining for about 5 minutes a day on average, they should last for 150 years. Please note that as with any other product, some of the nixie tubes can be faulty, that's why we test every watch before sale within a month. In any case, if you experience any problems with our nixie tubes within the warranty period, we will replace them free of charge.