Based on the original post, I understood him to mean that he's looking for a tactical style flashlight to use within a larger strategy, not that he wanted to use the light as a stand alone self defense instrument.
More information would be helpful, but I'd begin by suggesting Elzetta, a company that specializes in tactical flashlights. With the high/low tail cap, the Alpha model is both a tactical light and a useful edc flashlight. There are larger, brighter models, which may fit the bill depending on budget, mode of carry, and output requirements.
OP, as Peter suggested, filling out the recommendation form might be the best way to get educated answers to your question.