Originally Posted by
diplomancer
And that same reasoning applies to Blinding Smite.
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If you mean "unless otherwise stated by the text of the spell itself", your argument proves too much, and Lesser Restoration does not end Blinding Smite, or ends the Blindness but it comes back immediately. If you mean "unless otherwise stated somewhere else, with no need of referencing the spell specifically, just by dealing directly with its effects", I'd agree with that, and point out that Tidal Wave states that it extinguishes unprotected flames.
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But you're interpreting differently the interaction between Lesser Restoration and Blinding Smite, even though both the Blindness and the Wall of Fire are the spell effects that "lasts for the duration of the spell".