Zebralight H51

[jhc37013]

Re: Zebralight H51 details/preorder!!!

Checked the mail today and surprise a H51 and SC60 in my mailbox, I will report back after a try them tonight.

 

[skyfire]

Re: Zebralight H51 details/preorder!!!

Checked the mail today and surprise a H51 and SC60 in my mailbox, I will report back after a try them tonight.

:huh: h51 and sc60??? neither have been released yet, what a nice surprise!!!

still waiting for H51w for me. and also a H31w "flood"

 

[Beacon of Light]

Re: Zebralight H51 details/preorder!!!

Awaiting the H31F and H51F. Loving my H31 till that occurs.

 

[jhc37013]

Re: Zebralight H51 details/preorder!!!

So I have been playing with the H51 and like the SC60 I'm very impressed. I think the claimed 200lm output is accurate, I tested several light's via ceiling bounce using Lithium primary in the H51 and it tested identical to the PD30 Q5 which IIRC is ~200 OTF. Also like the SC60 you can memorize the high mode.

I'm really curious how long it can maintain at ~200 lumens, the claim is .9hr but I guess we will see. Hopefully someone with the skills and equipment can test it.

I took it outside with the H31 and although the H31 is brighter in the spot and spill the H51 really hangs in their well with it, so far it's great. 🙂

 

[skyfire]

Re: Zebralight H51 details/preorder!!!

So I have been playing with the H51 and like the SC60 I'm very impressed. I think the claimed 200lm output is accurate, I tested several light's via ceiling bounce using Lithium primary in the H51 and it tested identical to the PD30 Q5 which IIRC is ~200 OTF. Also like the SC60 you can memorize the high mode.

I'm really curious how long it can maintain at ~200 lumens, the claim is .9hr but I guess we will see. Hopefully someone with the skills and equipment can test it.

I took it outside with the H31 and although the H31 is brighter in the spot and spill the H51 really hangs in their well with it, so far it's great. 🙂

thanks for the info! now, for a neutral tint and im sold! ive been wanting a new zebralight for months, and just got a SC50w. it was intended as a gift but i dont want to give it up! then now there are talks about a sc51.

 

[Mac1]

Re: Zebralight H51 details/preorder!!!

Hows the H51 for closeupwork

Mac

 

[jhc37013]

Re: Zebralight H51 details/preorder!!!

Hows the H51 for closeupwork

Mac

Obviously not as good as the H501 but I'm sitting here looking at a hard copy book while the H51 is on low and with the book about 12" from my eyes the hotspot is ~3 inches wide and both pages of the book are full of light. I can use it on either of the two low modes and it does not bother me, so in short I think because of the wider hotspot from the XP-G it is fine for me with up close task. I have been comparing the XP-E SC50 that uses the same reflector and think it's much better up close. Everyone is different so opinions will vary and I would for sure pick up the H501 for reading and such but I would say the H51 is not handicapped in this area, IMO the low modes get down low enough and the hotspot is wide enough that I am comfortable reading a book in the dark with it so outdoor up close task should be cake.

 

[applevision]

Re: Zebralight H51 details/preorder!!!

Obviously not as good as the H501 but I'm sitting here looking at a hard copy book while the H51 is on low and with the book about 12" from my eyes the hotspot is ~3 inches wide and both pages of the book are full of light. I can use it on either of the two low modes and it does not bother me, so in short I think because of the wider hotspot from the XP-G it is fine for me with up close task. I have been comparing the XP-E SC50 that uses the same reflector and think it's much better up close. Everyone is different so opinions will vary and I would for sure pick up the H501 for reading and such but I would say the H51 is not handicapped in this area, IMO the low modes get down low enough and the hotspot is wide enough that I am comfortable reading a book in the dark with it so outdoor up close task should be cake.

I whole-heartedly agree.

For up-close work, the H501 warm has spoiled me... it's like being able to see in the dark!

But the H51 is as good as any flashlight for this task and, agreed, the XP-G really makes for a nice smooth beam. Totally passing grade, but clearly this is designed for looking up ahead... this will be the caving/trail/biking light to beat!

 

[jhc37013]

Re: Zebralight H51 details/preorder!!!

I whole-heartedly agree.

For up-close work, the H501 warm has spoiled me... it's like being able to see in the dark!

But the H51 is as good as any flashlight for this task and, agreed, the XP-G really makes for a nice smooth beam. Totally passing grade, but clearly this is designed for looking up ahead... this will be the caving/trail/biking light to beat!

Hey you got your H51 as well cool I thought I was alone. It's really nice isn't it, so hard to believe this AA light will do 200 for nearly an hour. I have done a few runtimes but I have not kept the same battery in longer than 20mins at a time as I was trying different brands of NiMh and primary. Having said that it seems the runtimes are accurate at ~1hr on max.

 

[Lightfreak29]

Re: Zebralight H51 details/preorder!!!

Hi,

out of curiousity how the h51 would compare to the h31 if I put a Energizer Lithium battery in it, I did some number crunching on the specs given.

The maths for those interested:
1) Data points for h51 are the specs for Sanyo Eneloop 2000mAh battery:
Light Output in Lumen: [200 100 30 8 2.5 0.2]
Runtime in hours: [0.9 2.1 12 39 72 456]
2) Data points for h31 are the specs for Panasonic CR123A battery:
Light Output in Lumen: [220 120 43 24 5 0.5]
Runtime in hours: [0.9 2 12 23 88.8 504]
3) Use lagarithm (base 10) on all data points, which will linearize them and they are better suited for interpolation
4) Use cubic spline interpolation to interpolate these logarithmic values for the following light outputs
Light Output in Lumen: [220 200 120 100 43 30 8 5 2.5 0.5 0.2]
5) Go back to linear scale
6) Lineary scale the resulting runtimes of h51 by 3/2. Sanyo Enelooop is 2000mAh, Energyzer Lithium is about 3000mAh (see Datasheet), both have about the same flat discharge curves for currents up to 2A.

Result:
1. Column: Output in lumen
2. Column: Runtime in hours for h51 Sanyo Eneloop 2000mAh (original data points are bold)
3. Column: Runtime in hours for h31 Panasonic CR123A
4. Column: Estimated Runtime in hours for h51 with Energizer Lithium battery


220 | 0.81 | 0.90 | 1.21
200 | 0.90 | 1.01 | 1.35
120 | 1.66 | 2.00 | 2.49
100 | 2.1| 2.69 | 3.15
43 | 7.49 | 12.00 | 11.24
30 | 12.00 | 18.33 | 18.00
24 | 15.25 | 23.00 | 22.87
8 | 39.00 | 60.76 | 58.5
5 | 50.65 | 88.8 | 75.98
2.5 | 72.00 | 153.92 | 108.00
0.5 | 215.59 | 504 | 323.38
0.2 | 456.00 | 922 | 684


Consider this being a rough estimate based on mathematical and electrical common sense. The results indicates a slight superior runtime for the h51 with lithium battery at higher output and a slight disadvantage at lower light output.

Cheers

 

[LED Cool]

Re: Zebralight H51 details/preorder!!!

to those members who have both the H31 & H51,

would the H51 fit into the H31 clip?
please post a photo if you have the time.

i would guess the H51 should fit nicely into the H31 clip because, according to the zebralights website, the diameter of both lights is 23mm. this 23mm is the max diameter at the head of both lights. so the body external diameter is smaller than 23mm.

i am hoping both will have the same body diameter because i have both SC30 & SC50 and these 2 lights body diameter are very similar but not exactly the same.

and if the H51 do fit nicely into the H31 clip, i hope zebralights would consider including the same clip for both lights since many members here wanted a clip for the H51.

thanks.
khoo

 

[psychbeat]

Re: Zebralight H51 details/preorder!!!

OK - I just ordered one for my GF- Im taking her backpacking
for her B-day and always let her borrow my bulky modded
brunton L3.

Id prefer the H31 or (H61 if they ever make it) but
AA is easier for her to deal with.

I also would've gotten a warm or neutral for her but
its not out yet with the XP-G.

this will be my first zebra- I hope she wont be bummed
on the UI. it seems pretty intuitive but she's def not a
techie 😉

 

[Incidentalist]

Re: Zebralight H51 details/preorder!!!

Glad to see these are available. I'm waiting for the H51W (and H51FW/H51WF?).

 

[jhc37013]

Re: Zebralight H51 details/preorder!!!

would the H51 fit into the H31 clip?
please post a photo if you have the time.

i would guess the H51 should fit nicely into the H31 clip because, according to the zebralights website, the diameter of both lights is 23mm. this 23mm is the max diameter at the head of both lights. so the body external diameter is smaller than 23mm.

i am hoping both will have the same body diameter because i have both SC30 & SC50 and these 2 lights body diameter are very similar but not exactly the same.


thanks.
khoo

I just checked this for you and the H31 body is slightly wider, the tailcaps are the same diameter so i guess that's where they get the 23mm.

With the H51 in the H31 clip there is a bit of wiggle room but that does not mean you could not use it because it takes a bit of effort to get the rubber back over the tailcap so it's not going to just come off on you.

 

[Burgess]

Re: Zebralight H51 details/preorder!!!

to Lightfreak29 --


Wow !

That is one TECHNICAL first post ! ! !


:thumbsup:


Yer' gonna' fit right in here, with the rest of us.

:wave:


Welcome to CandlePowerForums !

:welcome:
_

 

[swrdply400mrelay]

Re: Zebralight H51 details/preorder!!!

Man I'm getting antsy.


I've been waiting for the H51F to be released for months now. My wife was going to buy it for my birthday last month but it hasn't been released, so every week she's like "Can I buy your birthday present yet?"

 

[psychbeat]

Re: Zebralight H51 details/preorder!!!

yeah- I was waiting for the H61 or H61w ideally to buy one for
me n one for my gf but cant wait anymore so settled on one H51
and will hope the H61w is released before this winter when Im
doing more night time mountain biking and trail building.

:devil:eventually I plan to run two of them at once on the same headband:devil:

so it goes...

 

[jhc37013]

Re: Zebralight H51 details/preorder!!!

yeah- I was waiting for the H61 or H61w ideally to buy one for
me n one for my gf but cant wait anymore so settled on one H51
and will hope the H61w is released before this winter when Im
doing more night time mountain biking and trail building.

:devil:eventually I plan to run two of them at once on the same headband:devil:

so it goes...

I think you will be very pleased with the H51, it's very satisfying knowing I can run a headlamp bright and for extended times using a AA battery. If I know I'm going to be outside camping/hiking/fishing..etc I can start with my NiMh battery's and use lithium primary when I want to but also being able to throw a basic alkaline and know I can get reliable light is reassuring.

I want to do some more testing with alkaline just encase I ever find myself in the situation where it's alky or nothing. From the bit of testing so far using Duracell alkaline I lose max mode after a handful of minutes but the medium modes seem to do just fine, I'm curious how it will handle the 100lm high on alkys so I'm about to settle in and see if I can get a idea of the runtime and how fast I start losing output.

 

[Shorty66]

Re: Zebralight H51 details/preorder!!!

I just ordered my H51 🙂
Seems to be a really cool light...

 

[applevision]

Re: Zebralight H51 details/preorder!!!

After a few more days of use, I continue to echo the sentiments here... The flood version will be exciting as will the warm... But this is a spectacular light for what it is, and I think it sets a new bar for performance from a AA light!