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Difference between 50mW and 150mW

You could focus it to a smaller point with a magnifying glass...

BTW... I hope you are using Laser Safety Googles....:whistle:

Jerry
 





Is it very harmful to point the laser away from you and look at the point without goggles? Obviously shining the thing into my eye is a recipe for blindness.
 
I was at the Virginia Beach Hamfest today and a couple of vendors had some green and blue lasers. I purchased a 150mW and a 50mW laser. When I got it home, the 50mW laser was much brighter than the supposed 150mW. This concerned be because I paid a lot more for the 150mW! So I tried one test by placing an 8X magnifying glass about 6 inches from the laser while pointed at the ground. I did notice that the 50mW laser had a larger diameter spot than the 150mW laser through the magnifying glass. Why is it the 150mW laser is not as bright? Did I get a defective laser?
 
It's probably just usual chinese QC. Last hamfest I went to, I took my LPM. :D One guy selling 5mw pens was amazed everything he had was overspec heh. Another guy advertising 'high power' pointers... with no safety features I might add.. heh.. knew his stuff was crap because he refused to let me test any of his unless I bought whatever I wanted to test first.
 
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