Hello everyone! I'm Luigi and I'm an engineer working in Switzerland, I had already bought a torch in the past (12T6 UltraFire _-Lumen), I decided some time ago to buy another one just because I was still happy with my purchase. Then about 1 month ago, I bought an OEM TrustFire 18T6 18000-Lumen and I was all excited to have 18000 lumen lumens .... I have just received the parcel with myOEM TrustFire 18T6 18000-Lumen and I deo say I am very disappointed, because I made the comparison with the UltraFire 12T6 13800-Lumen and I saw that the torch UltraFire 12T6 13800Lumen is much more powerful than the OEM TrustFire 18T6 18000-Lumen. Therefore I advise all of you not to buy this flashlight (OEM 18000 lumen-Lumen TrustFire 18T6) thank you all for your attention!