with a R2 LED and a big aspheric lens of at least 60mm diameter. I have one like this, I made from a foodcan. Currently there is a R5 there inside. That's also nice. The R2 made a very narrow beam, which goes about 250 meters far. The beam of the R5 is bigger, but it goes as far as the R2.
Actually it is a laser beam i'm trying to defocus a bit. They claim 400m for a laser thats supposedly around 20mW range. With a 200mW one one can wonder. For safety purposes i migh try a lower powered one perhaps. I do not want to fry my eyes trying.
about the brightnes of a defocussed 20mW laser vs a well driven R2 LED. It depends, if your project just targets messing around a bit with lasers or if you actually have intention to actually use it for hunting for example.