I took the time to make a proper beamshot of my laser, I'm curious who be the closest in guessing it's wavelength and power. I haven't added any smoke or anything to visualize the beam more than just plain air (no vacuum).
Guessing power is impossible without knowing exposure time and aperture, as well as atmospheric conditions... but i have to agree that it looks like a green HeNe.
Given the typical output power of such lasers and the blooming of the led display, it can't be more than a few mW.
What gave it away it's a HeNe? I guess me asking the wavelength
But it's only 2mW, I doubt if there are any green HeNe's above 2mW. But I took this foto with a very long exposure. The beam is visible at night, but on this photo it looks far better than in reality.