I'm thinking about getting a wicked laser classic 20mw green laser, but I just wonder how powerful that is. I don't expect it to burn or anything (just hoping lol) but how bight will the beam be? thanks.
I've made pin holes through thin plastic with only 17-18mW, so don't get a false sense of safety with a 20mW laser. While it woon't light matches, it still has enough energy to burn through thin plastics and cause damage to you eyes if shined in them. 20mW is a good output for pointing at stars though and you will still see a beam in even slightly lit conditions, sych as in a room lit by a 60watt lamp..etc.