I have had my LumaPowerConnexion for about 2 weeks now and...unfortunately have been biten by the flashlight bug. I was just not happy enough with it although I was really getting there. The connexion worked very well for me on a search mission (a walk away altzimers patient (spellcheck?). I ran it on high for about an hour and a half. It lit up backyard fairly well. Of course my target was a human being at those distances. I found that the color of the Q5 made my partners Mag look like its batteries were dead. I was not that happy with the throw of the light though. While its seemed excellent conducting a house sweep, it really made me take several more steps forward into a backyard to get closer to an object I believed was a human before I could rule it out as being a stump. I guess what I'm saying is....back to the keyboard/drawing board. I like the run time of this light and the fact I could drop another AA in it...but the throw didn't impress me. Well I did some surfin and found another light I thought I would give it a try. Enter the D10. I really liked the switching mechanism and figured I would give it a shot. I thought the d10 was gonna be bigger when looking at it online, but when it got here, it was exactly the same size as my connexion. I figured..well for $10bucks more I guess I could keep this light just for its switch and resigned myself to keeping it just as a backup light...not being able to replace my Stinger. Then I turned on the D10.....WHOA!!! They both the same size reflectors, have the Cree Q5's and are single AA powered. What gives? This baby (D10) is riding on my hip from here on out. At one hundred twenty feet, I could see my mailbox and its post with the Connexion. Same distance, I could see if it was open ... and the tree line across the street...and the grass all around it...and the color differnce between the door and the box....SOLD!!!! Side notes....The D10 heats up more and its light is a much cooler Q5 beam (which I dont really care for). On a final positive note....the D10 switch is perfect for tactical applications..ie momentary contact option, twisty, clicky, dimmable...simply perfect.