P =21 watts electronis per amp per second 6.281018
Vrms =120
P=I*V rms
Irms21/120=0.175 amps
I ave is the current per unit time
current average 0.175*0.637 =.111 amps
electrons = .111 x6.28*10^18 per sec
700*10^15 electronic per sec
10^8=7*10^17*t
t= 1.4210^-9
I used the average voltage because rms is the power i could be wrong bob j