The Lance of Ra from Silent Thunder Ordnance is probably the longest throwing flashlight ever made. Even at half a mile Objects are clearly illuminated. Using the Night Piercer LED light engine, this aspheric thrower produces 2.5 million candela (not to be confused with candle power) and can concentrate light into a thin beam capable of traveling farther than any other flashlight. Check out Silent Thunder Ordnance’s website here for more info.
Lance of Ra:
The Lance of Ra is currently out of stock, but the light can be built to order if you contact them via their website.