'Turn off light child device.'

def _turn_off_light(self, value_type=None, value=None):

    set_req = self.gateway.const.SetReq
    value_type = (set_req.V_LIGHT if (set_req.V_LIGHT in self._values) else value_type)
    value = (0 if (set_req.V_LIGHT in self._values) else value)
    return {ATTR_VALUE_TYPE: value_type, ATTR_VALUE: value}
