  We report a study of radiative decays of \chi_{bJ}(1P)(J=0,1,2) mesons into
74 hadronic final states comprising charged and neutral pions, kaons, protons;
out of these, 41 modes are observed with at least 5 standard deviation
significance. Our measurements not only improve the previous measurements by
the CLEO Collaboration but also lead to first observations in many new modes.
The large sample allows us to probe the total decay width of the \chi_{b0}(1P).
In the absence of a statistically significant result, a 90% confidence-level
upper limit is set on the width at \Gamma_{total}< 2.4 MeV. Our results are
based on 24.7 fb^{-1} of e+e- collision data recorded by the Belle detector at
the \Upsilon(2S) resonance, corresponding to (157.8\pm3.6)\times10^6
\Upsilon(2S) decays.
