I've got one of those Hellfighter X-15s. Hmmmm....I feel somewhat embarrassed to say that I do not remember which great English CPFer gave me the great deal....but he's the same guy that sold a friggin' SF U2 for $60 (among other great things, really cheaply), God bless his soul. Anyway, I got it for $23, shipped from England! It's a nice light, but it's not some technological marvel or anything like that. It's just a basic, no-nonsense light. It's build quality is pretty good, I'd say. The walls are super thick and the threads are smooth. It does have somewhat of a cool look to it. A hundred and fifty lumens, though, doesn't sound right. I'd guess it was more like 80-100.