No, it makes sense. The parent is talking about continuous power measured in megawatts, i.e. megawatt-hours per hour, or megawatt-days per day. 300 million use

No, it makes sense. The parent is talking about continuous power measured in megawatts, i.e. megawatt-hours per hour, or megawatt-days per day. 300 million users * 4 hours/day * 5 watts = an average continuous savings of 250 MW.