It would be much easier to pick the nearest N stars and point lasers at them with a peculiar frequency that would stand out on any spectra. This random quora a

It would be much easier to pick the nearest N stars and point lasers at them with a peculiar frequency that would stand out on any spectra. This random quora answer[1] suggests lasers could potentially have a spread of ~0.1 arcseconds so that would be (10 * 60 * 60)^2 * 40k ~ 1e13 times less power required (per target) than an omnidirectional source. [1] https://qr.ae/pvZZjd https://qr.ae/pvZZjd