@property<EOL><INDENT>def monthly_clear_sky_conditions(self):<DEDENT>
if self._monthly_tau_diffuse is [] or self._monthly_tau_beam is []:<EOL><INDENT>return [OriginalClearSkyCondition(i, <NUM_LIT>) for i in xrange(<NUM_LIT:1>, <NUM_LIT>)]<EOL><DEDENT>return [RevisedClearSkyCondition(i, <NUM_LIT>, x, y) for i, x, y in zip(<EOL>list(xrange(<NUM_LIT:1>, <NUM_LIT>)), self._monthly_tau_beam, self._monthly_tau_diffuse)]<EOL>
A list of 12 monthly clear sky conditions that are used on the design days.