Duty lights have gone through numerous evolutions over the course of the last decade. We have seen the once standard one-size-fits-all flashlight morph into mission and unit specific lights.
So what makes a good duty light? It all depends on what you want to use it for. Obviously, you want it to illuminate an area or areas, but there are other considerations.
One of the areas of duty gear that has experienced a quantum leap in technology over the last few years is the flashlight, especially lightweight ultra powerful LED lights. Times have really changed from the days of the silver aluminum Eveready light.