These days, when the user "Men of God" replaced the lamp of EOL and received the new lamp, he found that the NEC and Panasonic FCL30 lamps had appeared that the lamp had been completely lit and the filament was still glowing. This condition may cause tubes to be easy EOL. This left two of his National FCL30 tubes damaged over a 4-year period.Is this the case in all 30W lamps in Japan?
Photo①：National(Panasonic) FCL30 850 running on Hitachi 30W(50Hz)ballast.
Photo②：NEC Long afterglow FCL30 827 running on Hitachi 30W(60Hz)ballast.(The tube in the middle)

I don't think that the filament causing the effect, but either phosphor thickness, or better possible explanation, the effect of the dark faraday space in the discharge:

In a preheat ballast, the filaments are heated only during preheating by the starter. After than, the only heat that the filaments gets, is by the thermionic emission of the discharge itself.
Rapid-start and electronic (Four wires, two for each end of the lamp, filaments aren't shorted) ballasts, supplies heating current to the filaments also when the lamp working, but these aren't the ballast of Men of God's fixture.

I don't think that the filament causing the effect, but either phosphor thickness, or better possible explanation, the effect of the dark faraday space in the discharge:

In a preheat ballast, the filaments are heated only during preheating by the starter. After than, the only heat that the filaments gets, is by the thermionic emission of the discharge itself.
Rapid-start and electronic (Four wires, two for each end of the lamp, filaments aren't shorted) ballasts, supplies heating current to the filaments also when the lamp working, but these aren't the ballast of Men of God's fixture.

Even on a magnetic ballast as you said, the luminescence of the lamp is maintained by the ion emission of the filament. But why is it that his also 30W Philips TL-D 30W/830 electrodes do not emit any luminescence when running on Japanese magnetic ballasts. And a Similar Situation was not used on the Japanese FL Series tube used by one of our friends in Japan. In addition, Japan normally uses the best quality phosphor for its own lamps, so it is basically certain that it is due to the characteristics of the working voltage and current of Japanese ballasts and the inferior electrodes used in Japanese tubes. In addition, the output frequency of his inverter power supply is unstable due to long-term use, which aggravates this situation, and even causes a slight luminescence phenomenon to appear in the electrode of another lamp that is not made in Japan.