def set_load_power(self, power_watts):
new_val = int(round(power_watts * <NUM_LIT:10>))<EOL>if not <NUM_LIT:0> <= new_val <= <NUM_LIT>:<EOL><INDENT>raise ValueError("<STR_LIT>")<EOL><DEDENT>self._load_mode = self.SET_TYPE_POWER<EOL>self._load_value = new_val<EOL>self.__set_parameters()<EOL>
Changes load to power mode and sets power value.
Rounds to nearest 0.1W.

:param power_watts: Power in Watts (0-200)
:return: