ok i am happy with it the light is 520 lumens ...i also think i will invest in the 2200 lumens one ...if math is any indication the light will cast a good beam of a 1/4 mile or better but i'm sure it will be seen a lot further away on the other end i am also sure it will really light up a full sail at night quite well ...but for a little less than 1 boat buck having two lights is going to be ok fine...i may even be able to blind Kermit in dallas or wherever he is this weekend lol
2 lights are good if you do a lot of night cruising.
The 520 lumin is about all that can be reasonably used.. the water either absorbs the light or reflects it away from our eyes, but on a clear night, the 520 lumin will illuminate another hard, reflective surface such as boat at nearly a half mile range well enough for you to identify it with binocs, if they are powerful and image stabilizing... a small buoy may need to be a bit closer to be able to pick it out of the blackness...
seldom does any sportboat ever need to focus a spot beam so intensly on any object at that distance... its more commonly less that a quarter mile and almost always less than 200yds...
Unless we are out on a night that is exceptionally black or stormy, a light is hardly ever needed, but as we do use the boat a lot during the coldest stormiest parts of the the winter, we need a good light and the stanley led light performs as well as any i have used...
