Does anyone know how to measure real power output for the laser?
I want to buy 8 watt laser
but have a big concern if they are rated and have real power output.
there are many supplies in google: https://www.google.ru/search?q=8+watt+laser&oq=8+watt+laser&aqs=chrome..69i57j69i60l3j0l2.3482j0j7&sourceid=chrome&ie=UTF-8
so how to choose the right one?