The express by it self only uses milliamps of power.... The kill-a-watt measurements are as follows:
.01 amps, 3-4 watts, 2VA. readings that low can have errors... I.E. 122 V olts (as read on the kill-a-watt) times .01 = 1.22VA. Now either the kill-a-watt is rounding up to 2 or the measurement range and accuracy compound the error.
The bottom line is that the LE does not draw enough power to be even a consideration in power calculations. When the LE was powered up, as the LED display scrolled, the readings would change by one or two. The final readings were taken once the display stopped scrolling.
Egenoup