Red or Green Laser Levels which colour is best - Laser Level ...
But which colour laser is best for you? Green beam lasers operate at a different light frequency to red and they generally have a greater class 3r output wattage 5mW compared to a standard class 2 red beam of under 1mW. Note you can also get class 3r red beam also with a sub 5mW output. So, producing the same power output as a class 3r green beam.