Would an 85 E or T be more reliable than a P because of the lack of programable options ie. less to go wrong? I guess I'm asking if they have a simpler circuit, or is it just that some of their features aren't activated. Thanks!
While the E and T are not programmable by the user, they ARE programmed and do use firmware on a chip as does the P.
I wouldn't worry about the reliability of the Novatacs in any case.
Look at how there are a TON of them being used by CPF members, and you can count the number of people who've had problems on one hand.
At the same time, I wouldn't rely upon a Novatac any more than I'd rely upon a Surefire or any other light.
For general EDC, I carry only one light (often, the 120P), but anytime I think I "need" to have something reliable (running burglar alarm calls, etc,), I simply take two lights (and maybe three if I have the pocket space).
The Novatac is one of those lights that has proven itself in widespread, real world use. Since NO product of any kind can have a "perfect" track record (e.g., the Space Shuttle
), I think the Novatac line has turned out to be one of the best.