Leading you to an educated decision.
RMS is an abbreviation for the 'root mean square' mathematical process of determining the effective value of an alternating current. The RMS or effective value of a current is by definition such that the heating effect is the same for equal values of alternating- or direct-current. However, the wattage found by multiplying the average voltage by the average current is not the same as the RMS voltage times the RMS current for pulsating direct-current. The product of average voltage and average current in a pulsating direct-current circuit is sometimes called 'DC watts.'