What flashlight is best often depends upon the situation. <br><br>As part of a 72 hour kit, you'll want a primary flashlight with medium power, a long throw and long battery life. For me the Princeton Impact fills this role. You may also want a task light which can be used flexibly for close work or map reading. For me, a MiniMag AA with Opalec NewBeam module fills this role. It is supplemented by a CMG Infinity with blue-green LED for preserving night vision. <br><br>All of these lights use AA batteries which are universally available, and feature LEDs for durability and long battery life. <br><br>For EDC use, more emphasis can be placed on operating features and therefore you choices cand be more flexible in terms of power supply and other aspects. I currently use an Inova X5T as an EDC flashlight along with and Inova keychain light as a backup. Another Inova keychain light is in my PSK. <br><br>Depending upon circumstances, I will also carry a Surefire, either a 6P or my E series, if I'm walking alone night. Because of their high power and short battery life, Surefires seem more like a substitute for searchlights, signaling lights or weapons than as utility flashlights. I'm afraid my current favorite is something of a confection: it incorporates the body and bulb from an E2 with the bezel and tailcap of an E1e, plus a GG&G TID bezel shroud, the clip and lanyard from a CMG Infinity and a kydex holster. It serves as a searchlight and as a substitute for pepper spray and a baton. <br><br>