[CharlesWayneCT]

The pulse lasts a mere femtosecond, and delivers as much power as the entire grid of North America into a needle point size spot

What I am looking for, and haven't found, is what the TOTAL WATTAGE of the laser blast is. We know it is very quick, and we know it is VERY powerful.

But if power/time turns out to be greater than the power saved by the treatment, it won't be useful.

[frithguild]

The pulse lasts a mere femtosecond, and delivers as much power as the entire grid of North America into a needle point size spot.

This has to be one of the most poorly written sentences I have ever read. So what did they do - suspend the delivery of all power to all consumers in North America for a femtosecond to accomplish this technological feat? Calling Nicola Telsa!