If you are looking for a mighty mite of a light, First-Light USA's Tomahawk is one to consider. It looks like the old plastic angle light many of us were issued in the military or purchased at the military surplus store. However, it's much more advanced. It can be had with just a white light, a strobe, multi-color (red/blue or red/green), multi-color strobe (the red/blue is for LE only), and a night vision version.
My test model is the multi-color in red/blue with a price tag just shy of $300. To activate the Tomahawk you depress the horseshoe-shaped button; if you want the red or blue lights use the two front buttons. The right button selects the color, while the left button sets the brightness. When the colored lights are on the white light can be operated by pushing the horseshoe button.
Keeping the Tomahawk close at hand isn't a problem. It has a clip that will attach to your duty belt or MOLLE vest and it does secure the light. When attached to your belt or vest you have hands-free use. A finger loop even allows you to use the Tomahawk while shooting. I found it works well using a traditional two-handed shooting grip. The Tomahawk is a distinctive duty light that will serve you well on and off duty.
One of the most innovative lights I have seen is the Emissive Energy Color Police LED. It has many distinctive features, the least of which is its carbon fiber body. Using this material drastically reduces weight without sacrificing the durability and toughness of the light's tube.
You can use the Color Police LED as a bright white light with momentary and constant on or an alternating blue/red light in slow or fast mode. It can serve as a standard light or as a signal light when setting up a highway checkpoint. To switch between these various modes you simply rotate the tail cap. The red/blue will automatically activate, and the push button switches to white light.
Another thing I like about this light is its size. It's small enough to clip in a cargo pocket or carry on a duty belt. You will find this ideal sized light will run for two to 72 hours with an output of 11.5 lumens to 225 lumens.
Emissive Energy did its homework when building this one. The Color Police LED offers bright light, color strobe, and a long runtime. What more could you ask for?
Another company that offers distinctive high quality lights is Inova. You will find a variety of lights in the Inova family but the "T" Series seems to be the best suited for duty use. The T-4 is powered by a rechargeable lithium ion battery, which will hold a charge for what seems like forever when not being used. When you are using this light on duty, the 200-lumen light will drain the batteries in approximately two hours of constant use. If you use the light off and on the charge should last an eight-hour shift. Fortunately the charger will run on your cruiser's DC power.
This light's aircraft-grade aluminum body and lens bezel have beveled checkering. The spacing of the checkers is such that it feels aggressive but it is not. It gives a good grip in wet or dry conditions, with or without gloves, and it won't snag
The switch is mounted forward on the barrel, near the bezel. It gives you several light modes: high or low output, strobe, and momentary and constant on. Simply depress it for momentary, double click for high, in high wait a second and depress the switch for low, and from high output a quick double click will make the light strobe. This may sound complex, but it really isn't; a little practice and you will catch on.