Olight Infinitum Round-up Review - I10, I15, I20, and I25 - Detailed Comparisons!

selfbuilt

selfbuilt

Flashaholic
Joined
May 27, 2006
Messages
6,936
Location
Canada
Reviewer's Note: This is a round-up review of all of the new Infinitum line of Olight lights. Lights were supplied by MattK of batteryjunction.com

Warning: Even more pic heavy than usual! :rolleyes:

Inf-1.jpg


The Infinitum series is a new line of lights by Olight. Similar in overall design and build to their classic T-series, these new I-series light feature a continuously-variable user interface. The UI is similar to that developed by ITP and subsequently used in the Olight Titanium Infinitum.

Since the interface is common to all members of the I-series, I have decided to review them all in one massive round-up review thread. :sweat: Following a general discussion of the common build and features of these light, individual comparisons of each light to its respective Olight T-series and ITP counterparts will be presented.

Common specs for I-series (adapted from manufacturer/dealer sources):
  • Cree XR-E R2 LED
  • Modes: Illumination (Digital infinite beam adjustment); Strobe; SOS
  • Tactical momentary-on forward switch, protruding switch for easy momentary or click to lock on
  • Auto memorization of the current brightness level when power off.
  • Linear ramping of output levels
  • Superior heat sink that disperses heat to protect LED and electrical components
  • Ergonomic design with solid structure for easy operation
  • Partial smooth/orange peel reflector on most models, full orange peel reflector on I25
  • Mil-spec: MIL-STD-810F
  • Highly Water resistant
  • Anti-shattering ultra clear lens, anti-scratching and anti-slip
  • Lock-out function to prevent accidental activation
  • Engineered anti-slip body texture that give you a firm tight grip
Battery configurations are as follows:

I10: Uses 1 x CR123A battery / 3v-4.2v RCR123A battery
I15: Uses 1 x AA battery / 1X1.2V Rechargeable. battery / 1X 3.7V 14500 battery
I20: Uses 2 x CR123A / 2 x RCR123A batteries / 1 x 17670 or 14670 battery
I25: Uses 2 x AA batteries / 2X1.2V Rechargeable batteries.

I25-2.jpg


Shown above is the packaging for the I25, but the others are similar (except for a more basic wrist lanyard included with the other models). Included with all lights is a wrist lanyard, extra o-rings, spare clear GITD tailcap button cover, decent belt holster and manual.

The I-series lights all share a similar build to the classic Olight T-series. In fact, the heads/bodies/tailcaps of the T-series are interchangeable with these new I-series lights. :thumbsup: Note that the T-series use a reverse-clicky, whereas the I-series uses a forward-clicky.

Full detailed pics will be provided for each light in its own section at the end of this review, but for now I will provide an overview of the common build upgrades.

Inf-2.jpg

(from left to right: I10, I15, I20, I25)

The reflectors are unaltered from the previous T-series lights. The I10 and I15 share the same head, and use a similar reflector to the I20 (partial orange peel – textured at the base, smooth at opening). This same reflector is also in use in the ITP C7/C8/C9 series lights. Like the T25 before it, the I25 uses a full textured reflector.

All pics are taken ~0.5m from a white wall, on Max (AW protected RCR for I10, AW protected 14670 for I20, 2xAA Sanyo Eneloop for I25).
Inf-Beam1.jpg

Inf-Beam2.jpg

Inf-Beam3.jpg

Inf-Beam4.jpg


Since the reflectors are unaltered from the T-series or ITP lights, I haven’t bothered doing direct beamshot comparisons to other lights. Please see my 1xAA, 2xAA, and 1xCR123A/RCR Round-up Reviews for comparisons of the T-series/ITP to other lights of the same class.

I10-3.jpg


As before, the I10 and I15 share the same head and tailcap – they differ only in the length of the battery tube (I10 shown above, scroll down for more detailed pics). You could thus pick up an extra battery tube to complement the model you don’t have.

Aside from the new circuitry, the main physical changes from the T10/T15 are the protruding forward clicky and an anti-roll ring at the head of the battery tube. This anti-roll ring covers the gap between the head and body that was visible on the T10/T15.

I20-3.jpg


The I20 has similar circuit and tailcap upgrades over the T10, and now also includes a removable bezel-pointing clip attached to the tail region of the battery tube. It is secured in place by its own cover/grip ring (unscrew the ring to remove the clip, screw back down to cover the gap where the clip attaches).

I25-3.jpg


The I25 uses a similar mechanism to the I20 to secure its clip, except that the clip is attached to the head of the battery tube and points toward the tailcap.

Personally, I like this new body design, as it allows easy removal of the clip without leaving a gap. :) The gap/cover rings are also textured to enhance grip.

For more detailed pics of each member of this I-series family, please scroll to the individual light overviews below.

I10: Weight 42.0g, Length 93.4mm, Width (bezel) 21.6mm
I15: Weight 52.5g, Length 110mm, Width (bezel) 21.6mm
I20: Weight 68.9g, Length 128mm, Width (bezel) 25.3mm
I25: Weight 87.9g, Length 159mm, Width (bezel) 25.6mm

Build Quality

Overall build quality is very high – at least as high as the original Olight T-series, and higher than the ITP lights, IMO. The new physical design features (anti-roll, clip, and clip-attachment point gap covers - depending on the model), are a step-up from original T-series.

Lights can no longer tailstand, but that’s understandable given the new common forward clicky. Clicky witch has good feel with normal traverse.

Screw threads are of good quality on all lights, though a bit thin (necessary to keep backward capability with T-series body parts). Tailcap threads are anodized, allowing for tailcap lockout. :thumbsup:

Fit and finish is very good on all samples, with no discolorations or chipping. Anodizing is type III (hard anodized), and lettering is reasonably sharp and clear (but could be a bit thicker, especially on the Infinitum label and model number).

Battery tubes are wide enough to accommodate protected or higher capacity cells, except for the I20 which shares the same limitation as the T20 (i.e. my AW protected 17670 cells won’t fit, so I need to use 14670 for runtimes). I was able to get my AW protected RCRs (16340) to fit fine in the I20.

Features and User Interface

The new Infinitum line features an updated version of the ITP continuously-variable interface.

All lights come with a forward clicky and three output modes: constant illumination, tactical strobe, and SOS mode. Press for momentary on, click for lock-on. You switch between states by soft-pressing the clicky, or turning the light off/on, with ~3 secs. If you leave it off longer than 3 secs, the light will come back on at constant-on at whatever level you last memorized it at (see below).

Like all continuously-variable lights, the I-series lights use PWM for their lower output modes. But the frequency is high enough that I can't detect it by eye or instrument. :thumbsup:

Strobe on the I-series lights was measured at a “tactical” (and dizzying) 12.7Hz on my samples. :green:

The continuously-variable UI is remarkably straight-forward: to activate the ramp, simply loosen the head slightly. This immediately starts the output ramping. When the light reaches the level you like, simply tighten the head to memorize that setting. To reverse the direction of the ramp, tighten and loosen the head again.

Note that unlike most of the continuously-variable competition, you don't need to perform a rapid twist switch or click repeatedly within a narrow time-window. Just loosen the head to start the ramp, tighten to save the setting. Very simple and intuitive. :)

Testing Method: All my output numbers are relative for my home-made light box setup, a la Quickbeam's flashlightreviews.com method. You can directly compare all my relative output values from different reviews - i.e. an output value of "10" in one graph is the same as "10" in another. All runtimes are done under a cooling fan.

Throw values are the square-root of lux measurements taken at 1 meter from the lens, using a light meter.

Throw/Output Summary Chart:

Inf-Summary.gif


No real surprises here on Max – the lights perform largely as expected. Max output of the I15 on 1xNiMH AA is a bit lower than most lights in this category, but is comparable to the earlier ITP C7 and Olight T15.

On Min, the I-series lights are typically intermediate between their ITP and Olight T-series counterparts. The exception is the I20 – my sample doesn’t go as low as my T20.
I am a bit surprised by these results, since most continuously-variable lights can go even lower.

To compare to other lights, please see my respective 1xAA, 2xAA, and 1xCR123A/RCR Round-up Review threads.

Scroll down for runtime graphs to see how the new I-series line up compares to the Olight T-series and ITP lights.

Variable Output Ramping

2AA-Ramp-1.gif


A representative ramp comparison is shown above for the I25. Ramping time has been reduced from the original ITP – it now takes only 2-3 series to complete the ramp, and there are no flashes to indicate the min or max positions.

Scroll down to the end of this review for a final commentary and general discussion of these I-series lights.

--------------------------------------

I10 Comparison

I10-1.jpg

From left to right, Duracell CR123A, Olight I10, T10, ITP C9

I10-2.jpg

I10-3.jpg

I10-4.jpg

I10-5.jpg

I10-6.jpg

RCR-Ramp-1.gif


Output/Runtime Comparison:

I10-MaxRCR.gif

I10-MedRCR.gif


I10-MaxPrim.gif
I10-MedPrim.gif


--------------------------------------

I15 Comparison

I15-1.jpg

From left to right, Duracell AA, Olight I15, T15, ITP C7

I15-2.jpg

I15-3.jpg

I15-4.jpg

I15-5.jpg

I15-6.jpg

1AA-RampEne.gif

1AA-Ramp14500.gif


Output/Runtime Comparison:

I15-Max14500.gif

I15-Med14500.gif


I15-MaxEne.gif
I15-MedEne.gif


I15-MaxL91.gif


I15-MaxAlka.gif

I15-MedAlka.gif


--------------------------------------

I20 Comparison

I20-1.jpg

From left to right, Duracell CR123A, Olight I20, T20, M20, ITP C6

I20-2.jpg

I20-3.jpg

I20-4.jpg

I20-5.jpg

I20-6.jpg

18650-Ramp.gif


Output/Runtime Comparison:

Note that the I20 and T20 runs are on lower capacity 14670, not 18650 like the competition.
I20-Max14670.gif

I20-Med14670.gif


I20-MaxRCR.gif

I20-MedRCR.gif


I20-MaxPrim.gif

I20-MedPrim.gif


--------------------------------------

I25 Comparison

I25-1.jpg

From left to right, Duracell AA, Olight I25, T25, T25 Tactical, ITP C8

I25-2.jpg

I25-3.jpg

I25-4.jpg

I25-5.jpg

I25-6.jpg

2AA-Ramp-1.gif


Output/Runtime Comparison:

I25-MaxEne.gif

I25-MedEne.gif

I25-LoEne.gif


I25-MaxL91.gif


I25-MaxAlka.gif


----------------------------------

Output/Runtime Pattern

Obviously, there is a lot of data to sort through up there. :sweat: But to give you the short version:
  • The regulation pattern and performance of these new I-series lights is is generally excellent.
  • The I-series are typically brighter and longer lasting on Max than either their ITP of T-series brethren. :thumbsup: This is likely due to the higher flux R2 emitters used on the I-series.
  • On ~50%, the I-series (R2) lights are typically still more efficient than the ITP (Q5) lights, but the T-series (Q5) lights begin to close the gap. This is as expected, since the defined output current-controlled circuitry of the T-series has a relative efficiency advantage (even though coupled with the lower flux Q5 emitters). Although not tested, on Lo/Min, I suspect the T-series lights would at least match or potentially exceed the efficiency of the I-series
Potential Issues

Minimum output of the I-series is not that much lower than the comparable T-series (and in fact the I20 Min is actually brighter than the T20 on Lo).

Ramp speed is relatively fast at 2-3 secs from Min to Max.

If you flash the light in momentary mode repeatedly in a short period of time, you will advance to strobe and then SOS mode. You need to wait ~3 secs between activations to come back on in constant-on.

Preliminary Observations

No beating around the bush - I think this new I-series is a nice upgrade to both the original Olight T-series and ITP line-ups. Olight has taken the ITP continuously-variable design, tweaked it, and incorporated it into an upgraded T-series with R2 emitters. What’s not to love? :kiss:

Personally, I like the new build features of the I-series lights, although most of these are incremental improvements over the T-series. That being said, I’m sure the forward clicky will find favour here. ;) Olights have always had a solid feel to me, and these lights are no different. A nice touch that they have kept the sizing and screw threads the same as the older T-series - so you can still perform mix-and-match “lego” on the various tailcap/battery tube components across the two series (where appropriate).

There are also some tweaks to the ITP circuit. Readers of my reviews will know that I am a fan of this simple intuitive head loosen/tighten interface for the continuously-variable ramp. Ramping time has been increased (not really a plus for me, but I know others like it faster). But the circuit has also been customized to work well with a forward clicky (previous “tactical” versions of the ITP lights lacked strobe/SOS, which were only available on lights coupled with a reverse clicky). Again, I see these as refinements to an existing line - but generally welcomed ones. However, if you like to repeatedly flash the light in momentary mode, you had better wait ~3 secs in-between each flash (or you will find yourself getting strobed).

One area that could still stand improvement is the minimum output level. One of the advantages of PWM-based lights is the ability to run at far lower levels than current-controlled lights (like the T-series). The original ITP lights don’t go as low as many of the competing continuously-variable lights, and the I-series lights are actually a bit brighter on their lowest level. To put that in perspective, the I-series lights are only slightly dimmer on Min than their corresponding T-series counterparts (and the I20 is in fact brighter than the T20). :thinking: Given the lower efficiency of PWM, this means you won’t see any significant improvement in max runtime of the I-series over the T-series, even with the I-series R2 emitters. :shrug:

Which brings up my last point – it’s good to see the Cree R2s being used here (and bonus: all were a premium “cool white” tint on my samples). Matt informs me that the Cree R2s used are actually sourced in the U.S., and shipped to Olight in China for assembly. This raises their cost, but insures reliable supply. R2s (especially premium tint) are still not available in quantity, and there is some concern that local Chinese distributors may be supplying re-labelled Q5s to manufacturers. The end result is that you can expect the true R2-lights to have slightly greater output over the Q5 T-series lights, and boosted efficiency over the Q5 ITP lights.

Basically, I look at the I-series as a merger of the best features of the ITP and Olight T-series lights, with a few upgrades and tweaks thrown in for good measure. The best of both worlds. :)

P.S.: I have added the results of the various I-series lights to my corresponding Round-up Reviews, so check those out to see how the lights compare to others of the same class.
 
Last edited:
Sector7

Sector7

Enlightened
Joined
May 29, 2008
Messages
247
Location
The Big Apple
Another excellent job! :thumbsup: Did you find it easy to accidentally activate the sos/strobe features during normal use?
 
jgraham15

jgraham15

Enlightened
Joined
Dec 19, 2008
Messages
230
Awesome review!!!!!! :twothumbs

I pre-ordered one of the I20's and have had it for around a month (don't remember the exact day I received it). It is a well made light and really bright for it's size. The half textured/half smooth reflector make for a pretty cool beam with a decent amount of spill but a good deal of throw. The only thing I don't like about this light is that I use momentary quite a bit and I always end up in strobe or SOS mode accidentally. If I could disable strobe and SOS it would be close to the perfect flashlight for me at work.
 
nanotech17

nanotech17

Flashlight Enthusiast
Joined
Jul 31, 2006
Messages
2,150
Location
N 03°13.884° / E 101°29.329°
well done selfbuilt,i know have switch my attention to AA cell lights to save cost.Just love your review on the AA cells segment.
 
selfbuilt

selfbuilt

Flashaholic
Joined
May 27, 2006
Messages
6,936
Location
Canada
Another excellent job! :thumbsup: Did you find it easy to accidentally activate the sos/strobe features during normal use?
The only thing I don't like about this light is that I use momentary quite a bit and I always end up in strobe or SOS mode accidentally.
Yes, I did find myself coming across strobe a few times during handling. :rolleyes: Eventually, I learned to give myself the ~3 secs necessary to allow it to reset back to constant-on. It's not an unreasonable amount of time, but does take a bit of getting used to.

well done selfbuilt,i know have switch my attention to AA cell lights to save cost.Just love your review on the AA cells segment.
1xAA is one of my preferred segments - comfortable in the hand, and very suitable for budding flashaholics. ;)
 
DM51

DM51

Super Moderator,
Supporter
Joined
Oct 31, 2006
Messages
13,338
Location
Borg cube #51
Great review, and these look very good. I particularly like the look of the 2 smaller models, the I10 and I15. I'll have to go back and study this in more detail, but certainly on first reading they look like winners.

I don't suppose there's enough spare metal there for the I15 body to be bored out to take a 17500 or 18500 for extra capacity over the 14500...?

Moving to the Reviews section.
 
selfbuilt

selfbuilt

Flashaholic
Joined
May 27, 2006
Messages
6,936
Location
Canada
I don't suppose there's enough spare metal there for the I15 body to be bored out to take a 17500 or 18500 for extra capacity over the 14500...?
Interesting question. The walls on I10 and I15 are pretty thick, so it's possible you might be able to bore it to allow unprotected 17500 (no way a 18500 is going in there).

My reasoning for that guess is the I20 is rated to take a 17640, and its exterior diameter is pretty close to the I15. As you would expect though, the I20 has pretty thin walls (i.e. they have already been bored for you!). Of course, even at that, my AW protected 17670 is too thick to make it (unprotected would probably work). Not sure if you could bore the I20 further to allow the protected 17670 to make it ...
 
jgraham15

jgraham15

Enlightened
Joined
Dec 19, 2008
Messages
230
My reasoning for that guess is the I20 is rated to take a 17640, and its exterior diameter is pretty close to the I15. As you would expect though, the I20 has pretty thin walls (i.e. they have already been bored for you!). Of course, even at that, my AW protected 17670 is too thick to make it (unprotected would probably work). Not sure if you could bore the I20 further to allow the protected 17670 to make it ...



My protected Ultrafire 17670's fit in the I20 but they are a pretty snug fit. :grin2:

My protected AW 17670 definitely won't fit! :shakehead
 
MattK

MattK

Flashlight Enthusiast
Joined
Dec 30, 2004
Messages
3,027
Location
Connecticut Shoreline
Yah the UF cells seem to fit fine. I think a number of the AW cells are larger than most - I know some people remove the sticker to help them fit in some lights.
 
selfbuilt

selfbuilt

Flashaholic
Joined
May 27, 2006
Messages
6,936
Location
Canada
Yah the UF cells seem to fit fine. I think a number of the AW cells are larger than most - I know some people remove the sticker to help them fit in some lights.
A good trick, I've done that with a few other lights (my VB-16 and 18650 comes to mind). But in this case, my AW 17670 doesn't fit even without the label - neither end of the battery will make it into the light.

But my AW 17670 is an older one, so it's possible the newer ones are better fit. And to put it in perspective, I recall this cell didn't fit in my Fenix P3D or Solarforce T7 either (two other lights that can supposedly take 17670s). As always, YMMV ... :whistle:
 
fugleebeast

fugleebeast

Newly Enlightened
Joined
Oct 9, 2007
Messages
101
Location
Seattle, WA
I originally had a Olight T-10 that I upgraded to an I-10. Before I gave my old T-10 away to a friend, I stole its reverse-clicky tailcap and swapped it for the new forward-clicky.

I found that when I had a forward-clicky on the I-10, I was temped to use the momentary-on feature which caused me to inadvertently reach Strobe mode too often. I don't necessarily feel that this is a point against the I-10, more of a point against me and my inability to adapt :). By switching it to the reverse-clicky, it solved this problem for me. Not only that, but I also got back the tail-standing function which I had been missing.

The I-10 is a near perfect EDC light for me. The quality and functionality is quite high, much like all of Olight's products.

A couple changes that I'd like to see made, to further help these lights reach near perfection:

1. It would be nice to have the option of purchasing a reverse-clicky tailcap for the I series. While the UI will be fine for most people, I have heard some people complaining about the accidental strobings. Installing a reverse clicky into the light has completely fixed the issue for me.

2. As Selfbuilt mentioned, having a lower low would be nice. While that feature alone won't make me switch to something like the Quark series, it is one thing that those lights appear to do better at this point.

3. I have a T-15 battery tube that I occasionaly use on my I-10. I love the AA battery option but I hate losing the new anti-roll features on the I-series. I hope that Olight eventually offers the I-series battery tubes for purchase.


I feel that, once again, Olight has done an incredible job and I very much look foward to seeing what they offer in the future!
 
selfbuilt

selfbuilt

Flashaholic
Joined
May 27, 2006
Messages
6,936
Location
Canada
1. It would be nice to have the option of purchasing a reverse-clicky tailcap for the I series. While the UI will be fine for most people, I have heard some people complaining about the accidental strobings. Installing a reverse clicky into the light has completely fixed the issue for me.
2. As Selfbuilt mentioned, having a lower low would be nice. While that feature alone won't make me switch to something like the Quark series, it is one thing that those lights appear to do better at this point.
3. I have a T-15 battery tube that I occasionaly use on my I-10. I love the AA battery option but I hate losing the new anti-roll features on the I-series. I hope that Olight eventually offers the I-series battery tubes for purchase.
Agreed on all fronts. I am quite impressed with the build and functionality of these lights - a lower low is about all I would ask. And I hope they do offer reverse clickies and interchangeable battery tubes in the new style (I'm sure they will eventually). In the meantime, you should still be able to pick up the "spare" T-series parts from their dealers.

Thanks Mr. Eric... your reviews are awesome! :wave:
These are pretty neat lights, I'm happy to spread the word. :)
 
DHart

DHart

Flashlight Enthusiast
Joined
Jan 8, 2009
Messages
2,433
Location
Sonoran Desert ~ Scottsdale, AZ
Great review, Selfbuilt, as usual!

Hmmmmm.... very tempting indeed. I too would like to see a lower low and the availability of I-series components to enable any combination of fwd/rev tailcaps and 1*RCR123/1*14500 I-bodies with a base I-series head. That's the set-up I would buy.

:popcorn:
 
alfreddajero

alfreddajero

Flashlight Enthusiast
Joined
Feb 23, 2008
Messages
1,750
Location
VA Beach.
Love the look of the I Series....wonder if ITP plans on coming out with a new look as well. Great review as always sir.
 
xevious

xevious

Flashlight Enthusiast
Joined
Dec 29, 2007
Messages
1,022
Location
Hoboken, NJ
This is an amazing example of review work. I'm seriously impressed! Selfbuilt's reviews just keep getting better and better. :)

And I am glad to see such positive info on this new Olight series. I have a T20 that I'm very happy with and now will have to add another Olight to my collection. :)
 
selfbuilt

selfbuilt

Flashaholic
Joined
May 27, 2006
Messages
6,936
Location
Canada
This is an amazing example of review work. I'm seriously impressed! Selfbuilt's reviews just keep getting better and better. :)
And I am glad to see such positive info on this new Olight series. I have a T20 that I'm very happy with and now will have to add another Olight to my collection. :)
Glad you enjoyed the review. Like the Quark round-up that followed it, it certainly involved a lot of testing.

I've long been a fan of the original ITP continuously-variable interface - it's nice to see it in the high-quality Olight build. I never understood why these new Olights weren't more popular. :thinking: There are a few areas I'd like to see improved here, but that's also case for almost all the lights I review.
Maybe it's just a sign of the crowded marketplace.
 
B

BillG

Newly Enlightened
Joined
Jul 13, 2003
Messages
188
Location
Harrisburg PA
great review (as usual). Olights are my preferred brand now. consistently reliable.

Bill
 
E

ericb445

Newly Enlightened
Joined
Mar 24, 2008
Messages
27
So is the I10 brighter then the T10?
 
Top