<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by lemlux:
Somebody posted hearing from Inova that the 15% increase in brighness came from improved heat sinking, not from moving from Nichia 5600's to 6400's. Heat sink improvement would appear to be the main motivation for the increased girth.<HR></BLOCKQUOTE>
I agree with Lemlux. I doubt that Inova would be marketing a longer, wider, heavier, more cumbersome product unless it implemented a significant improvement in addition to the tailswitch. Since Surefire's claimed 8% Pyrex brightness advantage is considered important to many in our group, then a 15% increase is too big to be ignored. Since the thrust of both the incandescent and LED markets is toward ever increasing brightness (often at the expense of runtime), then the Inova which provides significantly more brightness with no runtime penalty has an almost unique selling point.
I'm sure some of the other reasons mentioned here were factors, but I believe this one is key.
Brightnorm