Beam expander with one of these is just asking for trouble even in a rural area.
I wouldn't not use this at night with any line of sight to the sky if you make an expander.
Hell I don't even want higher powered green lasers anymore. What if some moron hits a plane and then they see yours at a off angle not aimed at them but still think you had something to do with it. That's what I'm scared of.This much green sticks out like a flare. I had a 400mw green then the crystal came loose and that was crazy I can't even imagine 1.5watts.
I wouldn't not use this at night with any line of sight to the sky if you make an expander.
Hell I don't even want higher powered green lasers anymore. What if some moron hits a plane and then they see yours at a off angle not aimed at them but still think you had something to do with it. That's what I'm scared of.This much green sticks out like a flare. I had a 400mw green then the crystal came loose and that was crazy I can't even imagine 1.5watts.