I mentioned the other day that the In Your Pocket (“IYP”) line has expanded recently…. I reviewed the IYP07 already, but today I have the IYP25, which is similar to the rest but is a 2xAA format.
Official Specs and Features
Unlike the IYP07 and many of the other IYPs, this one looks to be available in black only (for now?). There’s a Cree XP-G3 (for better throw and output) and a Nichia 219c version (seen here; better for color rendering).
Price and Coupon
I’m not sure I needed an AAx2 version of this light, but it’s a good addition. My favorite will be the IYP07, which is fantastic, and the IYP25 is basically a bigger longer version of it, with a mode or 2 added. All are fine lights, and I like that there are enough options that it’s possible to get the format you’d like.
The Big Table
|Price in USD at publication time:||$19.16|
|Turbo Runtime||High Runtime|
|Claimed Lumens (lm)||500|
|Measured Lumens (at 30s)||341 (68.2% of claim)*|
|Claimed Throw (m)||91|
|Candela (Calculated) in cd (at 30s)||154lux @ 3.835m = 2265cd|
|Throw (Calculated) (m)||95.2 (104.6% of claim)*|
|All my Lumintop reviews!|
* Measurement disclaimer: I am an amateur flashlight reviewer. I don’t have $10,000 or even $1,000 worth of testing equipment. I test output and such in PVC tubes!! Please consider claims within 10% of what I measure to be perfectly reasonable (accurate, even).
I’m fairly sure the 500 lumen output and 91m throw are based on the XP-G3 version. So the Nichia should be lower on both counts.
- Lumintop IYP25 Flashlight
- Spare o-rings (2)
Package and Manual
Standard Lumintop box. Manual is filled with four languages.
Build Quality and Disassembly
If you’ve had any other IYP series lights, the build quality will be no surprise. It’s good, it’s fine. Zero complaints.
The driver side (the head) has a brass ring that serves as a reverse polarity protection, and also excludes the use of flat top cells. The tail end has a spring.
The threads are appropriately lubed, square cut, and anodized. Thus, mechanical lockout is possible.
The brass (or brass coated) ring is not secured except with whatever the o-ring does. That’ll keep it in place, but it will come off if you wish.
The tailcap unscrews fairly easily, allowing removal of the pocket clip.
The whole tail assembly disassembles easily, too.
Size and Comps
Officially 138.5mm long and 18.5mm in diameter at the thickest.
Here’s the family!
Retention and Carry
The only thing included for carry of this light is a pocket clip. It’s a collar type clip, so very secure. There’s a nice balance with it too. It’s not deep carry, but it’s not that far off. The clip removes very easily, and the light works fine without it there. The gap where it goes, remains, though.
Power and Runtime
I tested the IYP25 with IKEA AA cells, the LADDA NiMH AA. Primary AA cells will work fine. Lithium ion 14500 cells will not work, and will almost certainly kill the light. The outputs are rated with alkaline cells, and I tested with only NiMH. However, output seems to be at least close enough to claimed output.
After the initial drop, which takes a couple of minutes, the stepdown is heavy. But then the output is very steady at 160ish (High) lumens for almost 2 hours.
Medium output is very stable for essentially the full runtime. Neither runtime (nor bench power) indicate the light has LVP. In fact, in this Medium runtime output finally stopped when one of the NiMH cells was essentially zero voltage. That’s not good for the cells for sure, but for NiMH it’s not the worst thing in the world.
Modes and Currents
|Mode||Mode Claimed Output (lm)||Claimed Runtime||Measured Lumens||Tailcap Amps|
The low two modes have PWM, but I don’t find it to be angry PWM.
For reference, here’s a baseline shot, with all the room lights off and almost nothing hitting the sensor. And here’s the worst PWM light I have ever owned. Also one of the very first lights I ordered directly from China!
User Interface and Operation
This is a mechanical reverse clicky switch. The cap is metal, and very clicky, with around 2mm of travel. Mashing the edges won’t do it – you’ll need to cover the switch to get it actuated.
The switch is big enough to allow tailstanding, but overall the light is just a bit too long for that.
Here’s a UI table!
|Off||Click||On (Mode Memory)|
|On||Half Press||Mode advance (LMHT)*|
The UI is very simple.
LED and Beam
In my review copy, Lumintop has a Nichia 219c. It’s a good temperature, too – warm. Stated as NW but quite warm NW. It’s perfect for this light, and this style light.
There’s a reflector, which is completely smooth.
The diffuser fits the head just fine.
These beamshots are always with the following settings: f8, ISO100, 0.3s shutter, and manual 5000K exposure.
Tint vs BLF-348 (Killzone 219b version)
I compare everything to the Killzone 219b BLF-348, because it’s inexpensive and has the best tint!
Random Comparisons and Competitive Options….
Here’s a link to a relevantly filtered page on parametrek.com. I use that site a lot!
Not another single light in this category!
What I like
- Available in Nichia
- Good build quality
What I don’t like
- No LVP
- This light was provided by Lumintop for review. I was not paid to write this review.
- This content originally appeared at zeroair.org. Please visit there for the best experience!
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