thanks
i readed the stickies, and i read that some laser could be underspec, overspec and up to spec, but i was no talking about that. i was asking if there would be 2 "up to spec 200mw laser" that could be differences in bright, length etc.
i don't understand english very well, so i don't understand some things about IR filters in the sticky "A Guide To Buying Your First Green Laser", now i don't know if i can ask or this forum is only for laser experts...
by the way, i know that more mW means more bright, but thing about, for example, a video or photo camera. we can have a camera of 8 megapixel and another camera of 7 megapixel. well, the camera of 7 megapixel could be better (or not), but the fact is, megapixel is not the only thing to take account. mW is the only thing to to take account in laser? (i repeat, talking about up to spec, not under or over spec)