bricksie
Newly Enlightened
A red ARC4 would be great for astronomy, or other situations where maintaining night vision is essential. The ability to dim the light would make it easier on the eyes (I find a very bright red light to be annoying while trying to view close-up items or reading star charts) and also dramatically improve runtime. The brighter settings would be great for setting up the scope, walking through a star party without blinding other people, etc.