Light an additional suppression capacitor is bright and pleasant but not unproblematic operation, may be required

The light is bright and pleasant as expected. BUT: There are times when this type of lamp, the lamp every 3-4 seconds as a flash light lights up briefly when switched off. I have the bad luck that it is with me so. According to a research on the internet I have this
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and this
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Thread found. Depending on the light switch used (for example, we have high-quality Busch-Jäger way switch with integrated dimming lamp), it may appear to cause this phenomenon. The solution is a suppression capacitor in parallel, the one clamped to the terminal block of the lamp. Recommended this was here
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This is very convenient, but unfortunately there is no longer the. In the competition (Conrad) there are similar, but they are significantly more expensive (approx. 3 EUR / piece). Unfortunately, my usual electric distributor Reichelt does not capacitors with pigtail. That's why I'm trying my luck with this alternative type Pollin:
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As the unit price of 15 cents is very low, I got myself equal to 10 pieces in stock, if once again flashing a LED. The shipping costs are naturally higher than the value of goods. Conclusion: Those who buy this lamp must be expected that again pending follow-up costs in the amount of 5-7 Euro for a suppression capacitor.