You know strangely enough you can actually tell the difference in the illumination, the 85W clearly puts out slightly more light. I did not expect that, I was under the impression that the light would be almost in-perceptibly brighter with the 85W. This is the first time I have seen one taken apart and after seeing it I would think that if you made a solid copper slug and threaded it in to the body with thermal compound between the threaded surfaces that the light would dissipate heat very well. I would think that you would also want a DC/DC converter to ensure that the proper V was sent to the bulb though as the voltage would have a pretty wide swing. I don't like the size of that reflector, with a halogen bulb there wouldn't be any throw at all. Maybe in the future I will think about it, but I might just save up all the money I make for the rest of my life and buy a Nightsword.
This is obviously a day late and a dollar short for this old thread. But I'm going to post here anyway. I just bought one of these eBay HID flashlights. Had the vendor change the bulb, which gave a color temp of 6000K, to one giving out 4300K. Oh, and it's an 85 Watt. All I can say about this light is that it sure is bright. Other than the brightness however, there's not much praise I can give this flashlight. The reasons are the same as what has already been shared by others before me here, so I won't bother rehashing them. I do want to mention however that I am attempting to improve this flashlight by modifying it. The first thing that I see is wrong with this light is the really lousy reflector. It's part parabolic and part just a cylinder. I've looked into buying a full parabolic reflector to replace it with. There's two ways I can go with this: 1) completely rebuild the head to accomodate a full parabolic reflector of somewhat greater width and depth, or 2) try the easier, but less likely to satisfy, route of merely lengthening the head to accomodate a much deeper full parabolic reflector (of the same width as the original). Not yet ready to attempt building a whole new head from scratch, I've opted to try the latter first. It's going to cost me $95 for a very good reflectivity full parabolic reflector. If this reflector proves to provide the better beam profile I am after, then I will lengthen the head to enclose it and have a better HID flashlight. If, on the other hand, this configuration fails to deliver the kind of beam I'm hoping for (i.e. highly collimated, low angle of divergence) I'll give serious consideration to buying a wider (bigger) full parabolic reflector, which, if the resulting beam is satisfactory enough, will then of course require taking on the building of a bigger head. But at this point, my focus is on the deeper reflector of same width. Unless something or someone happens to convince me otherwise, I'll be parting with $100 to purchase this reflector for this in the next day or two. Any constructive comments, criticisms, advice, links to resources, etc. are eagerly welcomed.
Thanks in advance,
Couver52