"I have been tracking all warranty at Excalibur and the Lumi-Zone has been the most trouble free model ever (and we get about .05% of all scope models sold back for warranty which is outstanding) and I have had very few come back due to fogging problems, maybe 3. I also have been using a Lumi-Zone this season and it worked perfect. We're happy with the quality of our scopes."
From the Excal marketing rep. Lets put this one to rest.