Newbie: Aleph2 Capacitor Question

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I am planning to use 20 pieces of 4,700uf 50v capacitors per channel for my Aleph 2 Power Supply with 35V-0-35V, 1K watt transformer. The voltage after regulation will be close to 45v. Is 50v rating on capactor running @ 45v too close?

I did searches and read many informative postings but still have this question. 45V will be about 90% of the rated 50V. Is that going to shorten the capacitor life or the 50V rating capacitor will be fine? Thank you for your help.
 
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