How long would I need to wait after application of Benzolye Peroxide to be able to be in the sun for twenty straight minutes?

I use products with Benzoyle Peroxide in them every day, but I'd also like to get a little sun on my face. I usually avoid doing this, but I'm paler than I should be. How long would I need to wait after application to be able to be in the sun for twenty straight minutes? In other words, if I use the product the night before, then wash my face with JUST water in the morning, will my skin still be super sensitive to the sun, or is it just when the product is on my face?

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