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We reconsider the utility of the radiative decay $B \to \gamma \ell \nu$ withan energetic photon in the final state for determining parameters of the$B$-meson light-cone distribution amplitude. Including $1/m_b$ powercorrections and radiative corrections at next-to-leading logarithmic order, weperform an improved analysis of the existing BABAR data. We find a provisionallower limit on the inverse moment of the $B$ meson distribution amplitude,$\lambda_B$, which, due to the inclusion of radiative and power corrections, issignificantly lower than the previous result. More data with large photonenergy is, however, required to obtain reliable results, as should becomeavailable in the future from SuperB factories.

B meson distribution amplitude from B --> \gamma l \nu