This is the key qualifier in answering this sort of question. I could take up the questionable hobby of illuminating the underside of airliners on final approach to DFW ~1000m overhead (but that might lead to being compelled to answer awkward questions posed by humorless men in serious suits). On the other hand, not everyone lives in in suburbia and works a desk job so they might need throw more than flood.It's going to be a different answer for many depending on their given set of needs
Living on the prairie the terrain around here is - shockingly - quite flat. I'm aware of but a few places in the region with even a 50' elevation delta on a 20% grade.Like generally mentioned, where you live is a big factor... even more is topography.
The issue I've had is that there's enough water vapor, dust, and air pollution in the air that about all one sees of a thrower is the beam itself past ~200 meters ... and the bugs. But that's been at ground level. On a hill the air is apt to have fewer particulates so the effect might be less pronounced.I can't imagine seeing a light that throws 1/2mi. and saying 'that's just tooooo much', standing way up on a hill.
The issue I've had is that there's enough water vapor, dust, and air pollution in the air that about all one sees of a thrower is the beam itself past ~200 meters ... and the bugs. But that's been at ground level. On a hill the air is apt to have fewer particulates so the effect might be less pronounced.