Sun light is about 1kW/square meter. A 737 has a wing area of 125 square meters. To deliver 7.5MW to those wings will need 60kW/square meter. That's a far gre

Sun light is about 1kW/square meter. A 737 has a wing area of 125 square meters. To deliver 7.5MW to those wings will need 60kW/square meter. That's a far greater energy density. As for "time in beam" of a moving beam. Presumably one end of the beam is fixed, and depending on the target's velocity the beam might not be moving much at all (oncoming plane).