How could be that possible???

Friends:
Perhaps it is a supernewbie question but how could be possible that two green lasers, one reading 151 mW and another 377 mW, both on a LaserBee A 2W, the one with 151mW burnt easily a match and the higher one couldn't do it?
One hint is that the higher one came direct from a Chinese Company and the other one came from one of our members....
What does it make the difference here, in term of parts? the lens? construction? Both?
I have promoted myself here to buy our lasers, but never thought it would be that severe the differences.

Thanks

Miguel

It depends on how thick the beam is, if one beam of the same power is thinner than the other, than the thinner beam has a higher intensity in a smaller area,

the more focused into a point the laser is the more intense the power is over a smaller area

There could be other contributing factors as well

Compare the dots at a distance using safety glasses and see what they look like. Lower power one may have better divergence and a smaller dot. Stronger one could be diverging more in a TEM mode other than 00 and have its power distributed over a different pastern.

Edit: I recommend you contact a mod to get that duplicate thread removed before you catch Flugzeugabwehrkanone