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Ian B.

Locale: PNW
Re: Re: Princeton Tec Byte on 06/25/2013 10:01:31 MDT Print View

"I found the battery life of the Byte to be low - that is, less than 2/3 of 3 AAA battery LED lights."

That's interesting. As previously mentioned, I don't use the high setting as it is overkill for hiking and only has a 2hr battery life. On low (more than bright enough to hike with imo) is advertised to have a 96hour battery life but are you getting less than that? Red is advertised at 146 hours which I use in my shelter.

I really can't say for sure as I don't track their claims but it seems accurate. A single set of batteries and only operating on low or red get me through the three seasons ok.

I've never gone running with it so I can't say whether or not the low setting would be ok for this if this is important to the OP or anyone else reading this thread.

I know Skurka, David, and others advocate wearing a light on their belt. The Byte has a clip which should work for something like that though I never tried. I have clipped it onto my molle system ok though.

Edited by IDBLOOM on 06/25/2013 10:04:52 MDT.

jerry adams
(retiredjerry) - MLife

Locale: Oregon and Washington
Re: SUL Headlamp on 06/25/2013 10:05:09 MDT Print View

I've used a number of 3 AAA LED headlamps. They all have the same problem, the "low" setting is way more bright than necesary. And "medium" isn't enough different than "low" or "high" to be useful.

"medium" should have the brightness of what "low" is.

"low" should be 1/4 as bright with corresponding longer battery life.

But, regardless, I use lithium batteries which are good for 1 year or 50 nights, but I don't use it very much, little night hiking.

Ken T.
(kthompson) - MLife

Locale: All up in there
Re: Princeton Tec Byte on 06/25/2013 11:49:55 MDT Print View


If you leave it on for say a half hour you won't be able to shut if off unless you pull the batteries Then there is the weird strobe effect when the batteries are getting low. Better choices out there, Ian must have the only two good ones or does not use them for more than a minute or two at a time. Battery life on the box is a downright lie. I really wanted to like it but alas, it was not to be.

Ian B.

Locale: PNW
Re: Re: Princeton Tec Byte on 06/25/2013 12:17:44 MDT Print View

Ken and Jerry,

I really appreciate your comments on the Byte headlamp. I've yet to run into a problem with them but your reports are concerning. The longest I've used it non stop was ~ 1.5 hours in the Ape Caves.

I've been eyeing the Zebra H31 Headlamp CR123 and now I have an excuse to pull the trigger.

kevin campbell
(rockymtbiker) - F

Locale: Michigan
tt on 07/27/2013 21:33:17 MDT Print View

Olight i3s EOS. I got one on ebay pretty cheap...light AND I zip tied it to a headband to make my "headlamp"...

Brian Lindahl
(lindahlb) - MLife

Locale: Colorado Rockies
Re: headlamp on 07/28/2013 05:26:39 MDT Print View

I'm also a big fan of the Olight AA EOS flashlight. I attach it to the brim of my hat as well. For less than an ounce with battery, it carries a TON of lumens.

If I'm doing more mountaineering-style adventures where I'm in rugged terrain at ungodly hours of the night, I bring a Zebralight H51.

(mountainwalker) - MLife

Locale: SF Bay Area & New England
ZebraLight H51w Neutral White or H51 Bluish White LED? on 07/28/2013 20:48:03 MDT Print View

I've tried H51 headlamps belonging to others - they are excellent for the weight. Mark and other ZebraLight H51 users - do you recommend the H51w Neutral Light model which offers up to 172 lumens:

or the H51 Bluish White LED, which offers up to 200 lumens:

In the Princeton Tec EOS headlamps I modded to work with a removable remote winter battery pack a while back, I replaced the bluish LEDs with natural white, and added a reflector that offered a better flood along with the spot (PT made the same improvement to the reflector a year or two later). The natural light is more pleasant for reading and lets you see things closer to their true colors.

It would be nice if they made the H51 with a slide in and out red lens.

spelt with a t
(spelt) - F

Locale: SW/C PA
Re: ZebraLight H51w Neutral White or H51 Bluish White LED? on 07/28/2013 20:56:54 MDT Print View

I went with the 51w, as I really do not care for the color tint of the cool white LEDs. I've been pleased with the 51w; colors do not look too washed out, and I usually don't have cause to use the highest brightness setting anyway so I don't miss the extra lumens.

Bob Gross
(--B.G.--) - F

Locale: Silicon Valley
Re: ZebraLight H51w Neutral White or H51 Bluish White LED? on 07/28/2013 21:06:39 MDT Print View

The color of the light is a very individual preference. I prefer the floody light pattern over the spot light pattern, so I have the Zebralight H501, which is a forerunner of the current H502.

I've done night photography using the headlamp, but its primary purpose is for night hiking. The medium intensity is fine for normal trails. I've kicked it up to high intensity for some mystery trail junction. If I use a lithium battery, it gets extremely good duration.

It seems like you could use a piece of red cellophone to get a red light out of it.


(mountainwalker) - MLife

Locale: SF Bay Area & New England
glad to hear you don't miss the extra lumens on 07/28/2013 21:11:09 MDT Print View

Glad to hear you don't miss the extra lumens. I'm not a fan of blue tint. My modded EOS with the neutral CREE is sooo much nicer to use than the original blue tinted bulb.

I've made duct tape + red cellophane filters - it would just be nice if they came integrated. Slide out, slide in.

olite on 08/01/2013 20:28:45 MDT Print View

I like my zebralight H51.
Put the holder on the back of a baseball cap, and wear it backwards. works great.

But I recently purchased an olite i3s eos.
Olite lists the specs with AAA alkaline batery, 750mah.

1hr at 80lumens, 10h at 20 lumens, 120 at 0.5 lumens.

But with an energizer AAA lithium, its 1200mah, the performance should be more like
1.6 hrs at 80, 16 at 20, and 192 at 0.5.

20 is enough for most night hiking. At 0.7 oz for battery and light its pretty hard to beat. With one extra 0.3 oz battery, for atotal wt of 1 oz, you get 32 hrs of hiking light.

The Fenix LD01 doesnt come close to the middle level burn time (3.5 hrs @28 lumens with an eneloop ~1000 mah would be ~4.2 hrs or so with 1200mah energizer.)

(mountainwalker) - MLife

Locale: SF Bay Area & New England
Olite i3s EOS safe with lithium? on 08/01/2013 20:56:27 MDT Print View

It's an excellent light for the weight, having tried an older version. M B, does the manufacturer say it's safe to run with lithium batteries?

Doug I.
(idester) - MLife

Locale: PNW
Re: headlamp on 08/01/2013 21:11:38 MDT Print View

My light is anything but SUL, but I really favor the Fenix PD32. Lots of light when I need it, lots of battery life when I don't. I've put it in a Zebralight headband and wear it on the side of my head. Works great.

light on 08/01/2013 21:58:16 MDT Print View

I have read the mfg lists the voltage range as 0.9-3V. Energizer lithium L92 is only a 1.5V battery, but is 1200 mah. should be significantly better than the alkaline they list the figures for.

My zebralight list the burn times for eneloop 2000 batteries, but the AA energizer lithium are closer to 3000mah as well. Its medium level is 30 lumens, but with a AA energizer L91 will only give about 12 hrs at that level .

I think the little olite will give more useable hiking light, for less weight, than even my zebralite.

of course the 8 lumen setting on the zebralight is extremely long life. And some think its enough as well, and likely is.

What I want to see, is a UL AAA headlamp made by zebralight that lets you customize the lumen settings with many more choices.

Edited by livingontheroad on 08/01/2013 22:06:50 MDT.

mik matra
(mikmik) - M

Locale: Allways on the move
Not a headlamp but thinking outside the box on 08/02/2013 02:20:53 MDT Print View

I got this (you can buy it off ebay very cheaply);


It's a solar charged 3 led light. Now I stress I do not aim to nor do I want to walk in darkness/at night so this light does it's job for in-camp purposes.

It weighs under 15grams and I siliconed a piece of Velcro to the back side of it. The other side of the Velcro I stitched to my hat's brim. That way I can use the light where ever I want to a head lamp. Here it is;


I think that this way it will be counted as an SUL 'headlamp'.

And yeah, it throws plenty of light for in-camp duties including gathering more firewood and it recharges through the day. Win win :)

Edited by mikmik on 08/02/2013 07:18:45 MDT.

Drew Jay

Locale: Central Coast
olite i3s eos on 08/04/2013 06:18:16 MDT Print View

Thanks for the tip on new Olite. I'll have to try one vs. my LD01.

spelt with a t
(spelt) - F

Locale: SW/C PA
Re: olite i3s eos on 08/04/2013 11:14:50 MDT Print View

Likewise, thanks for bringing it to my attention. That looks like a nice xmas present for a few people.

olite on 08/04/2013 18:35:25 MDT Print View

My wts on the Olite I3S EOS are 0.41 oz for the light (no keychain), and with an energizer ultimate lithium its 0.68 total oz.

Did a practice walk in the woods a few nights back to verify the 20 lumen setting was good enough, and it is. Mostly looking at the ground at night a few feet in front anyway.

Going to do a burn test on medium setting to verify what time I get.

So far Im pretty happy with this little light. It has a very secure clip which clips on a hat bill. No chance of this thing coming off.

Edited by livingontheroad on 08/04/2013 18:36:55 MDT.

(mountainwalker) - MLife

Locale: SF Bay Area & New England
Where to find a good adjustable headband for Olite i3s EOS on 08/04/2013 20:32:17 MDT Print View

Any suggestions on where to find a good adjustable headband for it, which I can secure the light to with zipties?

Drew Jay

Locale: Central Coast
Headband on 08/04/2013 22:05:32 MDT Print View

You can make one pretty easily. I dug into my spare cordage/odds & ends bag and made one in a half hour:

Cut a length of 3/8-3/16" heat shrink tube (unshrunk) to the length of the flashlight clip. Slide it onto a section of 1/2" grosgrain webbing. Close the loop by sewing in 3" of elastic webbing. The circumference should be about 3/4-1" smaller than your head measurement. Melt the ends of the grosgrain and elastic first so the stitches will hold. Done!

It works great, very secure. You just slide the light back and forth to center the beam horizontally, and the band up or down on your forehead to position it vertically. It weighs 3 grams, so add an Olight eos and a lithium battery and you get an extremely functional headlamp for .79 ounces. I think I will start carrying it as it's more secure and adjustable than clipping the light to a hat brim.

You could skip the grosgrain and just use elastic webbing - it would be a bit heavier and probably more comfortable. I didn't have a long enough piece of elastic though.


Edited by drewjh on 08/04/2013 23:35:54 MDT.