Originally posted by hannibal lecter spyderco
now this really sucks I would think they would figure away to adjust the power levels on these things like adim switch. Non of the surefire are waterproof. from what I read on their website. I was thinking buying one of their high end ones but with a runtime of an hour I'm a bit worried by such a short runtime.
First, to correct some misconceptions, the E1 and E2 both have >1 hour runtimes. All surefires are water resistant -- I've taken them out in drenching rains with no problems. The M-series Surefires are "waterproof", in the sense that you are thinking of. Many of them are waterproof enough to be useable as divelights, although surefire wants you to ask them for a pre-tested light if you're going to take your m-series light underwater for diving.
All the SureFires have pretty good shock resistance, something that was not true a few years ago, but they've improved a ton. The M-series lights are astoundingly, amazingly shockproof.
Surefires having world-class-best well-focused, smooth, bright beams.
With runtimes of 1.5 hours or less, they are not the best choice for long-runtime applications like being the primary light for emergency lighting or camping, although as a secondary emergency ultra-bright searchlight they still can play an important role. More importantly, there is a rumor that the E2 is going to get a lower-power, higher-runtime lamp. If so, that will let you use your E2 as both a 1.5-hour blindingly-bright light, or a (hopefully) 3+ hour light.
3+ hours is still not a lot of time, if you want 20 hours or more on a set of batteries, you're definitely looking at LED lights.
The batteries that surefire takes, the 123A types, can be had at good prices if you buy the Surefire hurricane lamp, which is basically a cheap plastic lamp wrapped around 12 123A batteries, so primarily serves as a way for surefire to sell you 123A batteries cheaply, to make running their lights more affordable.
Joe