^ this is the keyword ..... "apparent" .....
As example, i see my 220mW 808nm focused as a little red bar "apparently" 2 mW, with a dark red halo (also if it start to smoke non-white things in half second
) ..... "apparently", none of my friends see the halo, and 2 of them, almost can't see the dim red bar ..... i always see green dots with a halo 10 times bigger than the point, if i don't point them on a black opaque surface, one of them see just the dot also on a cement wall, and start to see a halo only if i point a 50 mW on a white paper ..... with 405 nm at 100 mW, i see scattering halos also if i point it perfectly focused on opaque black plates (i see a halo made like a star with a lot of spikes, randomly moving, not just the usual shaded halo, probably my eyes accomodation get tricked from the UV part), where almost all my friends see just the dot with a fading halo ..... and one of the ones that is unable to see the red from the IR, can't fix the dot, also on a black object, for more than 5 or 6 seconds, then start to cross the eyes and tear, and have to stop to look .....
Also if is true that, basically, the peak sensitivity of the human eye is on the green region, perhaps that not all the peoples have the same identical sensibility curve about level and spectral range, also in absence of color blindness (daltonics) ..... so, how can we say this is better than that, or brighter, if anyone can see it differently ? .....
Just a thought .....
