Thinking of getting one of these, I have a few uses for it.
1) nextdoor put there little constant yapping dog out at 12:30 for 10 mins to take a crap. Thinking I might shut it up with a sharp boost of sunlight. might render it blind for 5 seconds.
2) neighbours boyfriend often seen hanging around waiting for girlfriend at end of my drive, might let him know I am there.
3) might temporarily blind a few cyclists who ride down the pavement outside my house.
anyone got any other good uses for this...