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    Cant decide which laser to buy

    Hello, I found these 2 cool lasers on laserpointerstore.com and can't decide which one is better: 1. 450nm 1600mw Thor M2 for $50 2. 520nm 300mw for 65$ Which one would be better at reaching far distances? Would the dot of Thor M2 laser still be visible on the buildings 6km away? Which variant...