Cyclops is a company that is known in the flashlight world for making high quality flashlights that have good battery life and hold up over time. These flashlights are usually used in the military and law enforcement because of their extreme durability. They also have a bit of a following with people very serious about the outdoors. This has given them a newer reputation of consistently bringing the newest handheld lighting technologies into the market first. Their lights always go through some very extreme real life testing before it will ever go on the market for you to buy it. When buying a Cyclops flashlight you are virtually insured that you will get high quality.
One of their most famous flashlights is the Cyclops CYC-XRF. This is a flashlight that has a high quality machined aluminum housing that can withstand some incredibly rough handling. It is intended to withstand all of the elements(though I don't believe it is completely waterproof, you probably shouldn't take it diving). The casing has been given a very nice corrosion resistant finish. As you would expect, the flashlight only uses ultra bright xenon light bulbs. This particular bulb can put out a 105 lumen so it should be bright enough for just about anything you could possibly be doing with it. The rechargeable battery should last about one and a half hours and includes an AC adapter. The flashlight is approximately eight and half inches long and weighs about two pounds. It is definitely a bit big for you to just fit in your pocket but they have other flashlights for that.
For smaller flashlights you might want to go with a Cyclops CYC-XCF. This flashlight is also considerably cheaper. This flashlight also uses an ultra bright xenon bulb but this one puts out only 80-lumens. This should still be bright enough for most applications. I don't think there are any other flashlights this small on the market that are significantly brighter than that. The flashlight has an aluminum reflector cup which makes the light a lot brighter than the plastic reflector cups that companies usually use. This is why you would pick cyclops over those companies though. This light also comes with a convenient belt clip. The flashlight includes 2 three volt lithium batteries so you can always keep it charged. This xenon rechargeable flashlight is a great choice for anyone in need of a high quality flashlight.