Where I work I have been using the standard Polystinger daily for about the last 6 years. It is a harsh industrial environment and the Polystinger is the flashlight of choice for almost all the 60 employees. Mine turned up missing one day so I decided to try the LED version as a replacement. The brightness and battery life are absolutely incredible compared to the original stinger.Light: Comparing it side by side to the Xenon polystinger, the light appears to be about 30% brighter plus it a very white light as opposed to the Xenon's yellow tint. The three levels of brightness are a nice plus - especially when you are doing close work where the full power can be too much. The light is a fixed focus with a very bright center and much dimmer surrounding cone. It cannot be adjusted from flood to spot like the Xenon version. The light is much cooler and I do not thing it will dis-color or melt the lens like the Xenon units do.Battery: I typically got about 45 minutes of on and off use from the Xenon unit. I have used the LED stinger for over 1.5 hours on the medium and bright levels without it going dead. When working in electrical cabinets I can turn it to the medium or low power level and leave it on without worrying about it dying in the middle of a job. I have yet to run the light completely dead.Construction: Very similar to the Xenon unit. The lens on the LED unit can be replaced without special tools - the Xenon require a lens extractor. The second switch at the back of the unit is a nice plus and will come in handy when the primary switch fails - I typically had to replace my switch annually when it would get too gummed up with dust to function anymore. The back switch does increase the diameter of the flashlight so if you already have a ring type holster for a stinger it may not work with this unit. I have seen Xenon stingers dropped from over 70 feet, dropped into tanks of water and oil and left outside in the weather for weeks at a time and the worst damage required a bulb, lens or switch replacement. I expect this unit to be just a durable.