Finally I put Epieon in 4AA responder( a new one). The beam is white and can be focused. I don't have many flashlights so I have nothing to compare with but I can say it less bright than Tec Surge and Pelican Stealth 4AA, but brighter than 2 AA responder. I am looking for a long throw one. This one actually doesn't throw that long. Probably about 20+ yards but I don't think it can reach 40. I tested it for runtime last night. The first round for 2 hrs , and the second for 3 hrs continuously. The best tool I got is my own eyes. The beam is a bit dimmer but not much. I just got back from picking up my mail. I think it still can reach 20+ yards just like before. I like the result and I like this combination. Responder is very handy, just a bit smaller than Stealth 4 AA. I am interested in SL 3AA luxeon and would like compare to my Epieon 4AA responder. I am not sure which one will have a better throw. If anyone has one , how far SL 3 AA luxeon can reach ? I read from someone in this group mentioned about it has a good throw but did not say how far...