Hmm, just looked at my 2004 and 2005 SF catalogs--the L4 is listed at 65 lumens...unless I'm hallucinating. (I don't have the 2006 catalog.)
In all fairness to SF though, ever since I "discovered" SF a number of years ago, I've read that they tend to understate the output of their lights. Many/most other manufacturers tend to overstate and exagerate the output of their lights, so the understatement was perceived as more "honest." So...the output may very well have been 100 lumens, but they listed it at a very conservative 65. Just some wild speculation/opinion...
Perhaps the only way you'll really know, is to find someone who can accurately test the output of your light.