I'm a huge fan of this little guy.

http://www.amazon.com/Cyclops-CYC-MHC-W-Micro-Mini-Light/dp/B001QCXTBI

You can find them at Gander Mountain, Kmart, and all over for 4 bucks with batteries.

Weighs .38 ounces with batttery.

An alternative to the ITP A3 EOS is the Maratac. Same emitter and electronics but a better case (knurled, and it can end-stand). Mine weighs 0.7 oz with a Li AAA, and you can turn the pocket clip around to hang it from your hat brim.

"Say 1 flash for every 25% of estimated power, so a fresh battery would give 4 quick flashes."

That wouldn't be easy to do, because the light has no way of knowing what kind of battery was powering it. A lithium primary battery has three or four times the energy density of an ordinary alkaline primary battery.

If the user had to flip another switch depending on the kind of battery being used, that would add more weight and complexity to the whole unit.

--B.G.--

Mark,

I was talking about the reviews for the hp10.
There 53 reviews for it.

The one thing I really didn't like about the zebra light was that it moves around in it's plastic cradle casing while you're running.
You have to constantly rotate it up. Even with some tape to stretch it out it eventually just stretches the plastic out and then doesn't work at all.
I love the light itself, but the hp10 has a better beam to run with.

I do love my Fenix HP10, but I think the Spark ST6 headlamps would be better for running or hiking trips that are just a night or three. It's much lighter than the Fenix, but also puts out more than twice as much light. I can't get to their site right now, but it was www.spark001.com.

Princeton Tec Eos. the new model at 70 lumens

Great beam with a nice color tone that is powerful and has a good spot with nice spill.

Low setting is good for around camp and low enough for reading in your tent.

High setting is a powerful spot for night hiking or spotting but also has enough spill so you dont get tunnel vision.

Sealed and very waterproof

Regulated so the output stays level for most of the battery life

Comfortable with a stable pivot point.

Uncomplicated interface with large single button. High Med Low Strobe Off.

$40

I continue to hear so much good stuff about this light and its versatility too.