Olight i3T EOS (Orange) Flashlight Review
The Olight I3T EOS is a single-AAA flashlight with a forward clicky switch. The TIR optic gives a great beam shape, too! Read on for testing!
Official Specs and Features
Here’s a referral link to the Olight i3T EOS flashlight product page.
Versions
So many versions of the Olight i3T EOS flashlight are available! That includes many colors – black (aluminum), desert tan (aluminum), polished stainless steel, and carbon fiber. And that doesn’t even include this orange version, which I have already owned for a while and is not for sale anymore!
Price
The aluminum version of Olight i3T EOS flashlight sells for $19.95. Other versions are more expensive, all the way up to carbon fiber at $44.99.
Short Review
A fine little simple light. I like the design, the switch is good, and I really like the simplicity. And obviously orange is fantastic!!
Long Review
The Big Table
| Olight i3T EOS (Orange body) Flashlight | |
|---|---|
| Emitter: | Philips Luxeon TX (Cool white) |
| Price in USD at publication time: | $19.95 |
| Cell: | 1xAAA |
| Runtime Graphs | |
| LVP? | Yes |
| Switch Type: | Mechanical |
| On-Board Charging? | No |
| Claimed Lumens (lm) | 180 |
| Measured Lumens (at 30s) | 177 (98.3% of claim)^ |
| Candela per Lumen | 6.3 |
| Claimed Throw (m) | 60 |
| Candela (Calculated) in cd (at 30s) | 47lux @ 4.518m = 959cd |
| Throw (Calculated) (m) | 61.9 (103.2% of claim)^ |
| Item provided for review by: | zeroair.org |
| All my Olight reviews! | |
^ Measurement disclaimer: Testing flashlights is my hobby. I use hobbyist-level equipment for testing, including some I made myself. Try not to get buried in the details of manufacturer specifications versus measurements recorded here; A certain amount of difference (say, 10 or 15%) is perfectly reasonable.
What’s Included
- Olight i3T EOS flashlight
- Primary AAA cell
- Manual
Package and Manual
Build Quality and Disassembly
Like many Olights, this light has a nice feel in-hand. The anodizing is top quality and feels very smooth.
The fancy “double helix” Olight is so proud of needs to provide a good grip for one-handed use. It does an okay job in this regard, but I found it to be not quite as grippy as I wanted, and yet a bit sharper than I like all at the same time.
The tailcap has a good bit of reeding, allowing easy cell swaps.
This is as far as I got the light apart. The head didn’t come off readily, and I didn’t fight with it.
The tailcap has nice thick square-cut threads and is unanodized. This does mean that physical lockout isn’t possible, but as this is a mechanical clicky, there’s no drain on the cell if the light is off. There’s also a spring on the tailcap. It’s not double sprung, but it’s stiff enough, and nice quality.
The positive end has only a little button (no spring) for contact. That is perfectly sufficient.
Size and Comps
Officially Weight 41g, Length 89mm, Head and body diameter 15mm.
If the flashlight will headstand, I’ll show it here (usually the third photo). If the flashlight will tailstand, I’ll also show that (usually in the fourth photo).
Here’s the test light with the venerable Convoy S2+. Mine’s a custom “baked” edition Nichia 219b triple. A very nice 18650 light.
Also above is the light beside my custom engraved TorchLAB BOSS 35, an 18350 light. I reviewed the aluminum version of that light in both 35 and 70 formats.
Retention and Carry
The pocket clip, which arrives installed. It has the folded-over, clip-either-direction setup, and there’s a lanyard hole in the shoulder, too. At one point I didn’t like these clips, and while I still prefer the more traditional type, these have grown on me a little. Whatever you think about the clip part, it is held snugly on the body.
Clip hug!
No lanyard or magnet or anything else is included for carrying the Olight i3T EOS flashlight.
Power and Runtime
Power is provided by a single AAA cell. Olight does include a primary cell, but all my testing was done with an Eneloop AAA NiMH.
I do think you should use rechargeable AAA cells in the Olight i3T EOS flashlight and I recommend these Amazon Basics.
The cell goes into the Olight i3T EOS flashlight in the usual way – positive end toward the head.
Runtime is rated at 21 minutes for High. Output is in fact steady at around 180 for almost 10 minutes, then drops off steadily to around 60. 60 lumens is much higher than the next mode down (Low), and this is stable for another ~50 minutes.
Modes and Currents
| Mode | Mode Claimed Output (lm) | Claimed Runtime | Measured Lumens | Tailcap Amps |
|---|---|---|---|---|
| High | 180 | 21m | 177 | |
| Low | 5 | 16h | 9 |
Pulse Width Modulation
Neither output level uses PWM.
Here you can see a “baseline” – a chart with almost no light hitting the sensor. Then there’s the Ultrafire WF-602C flashlight, which has some of the worst PWM I’ve seen. It’s so bad that I used a post about it to explain PWM! Here are multiple timescales (10ms, 5ms, 2ms, 1ms, 0.5ms, 0.2ms) to make comparing this “worst” PWM light to the test light easier. That post also explains why I didn’t test the WF-602C at the usual 50us scale.
User Interface and Operation
The switch is a mechanical forward clicky. It’s very clicky and clicks on the downstroke and upstroke. The click is quite loud.
Here’s a user interface table!
| State | Action | Result |
|---|---|---|
| Off | Click | Low |
| Low | Click | High |
| Off | Half press | Momentary (Low first, another half press for high) |
The light will revert to low as the next mode once off for 2 seconds.
LED and Beam
The emitter used in this AAA light is the Philips LUXEON TX.
That emitter is coupled with a clear TIR.
LED Color Report (CRI and CCT)
[in progress]
Beamshots
These beamshots are always with the following settings: f8, ISO100, 0.3s shutter, and manual 5000K exposure. These photos are taken at floor level and the beam hits the ceiling around 9 feet away.
Tint vs BLF-348 (KillzoneFlashlights.com 219b version) (affiliate link)
I keep the test flashlight on the left, and the BLF-348 reference flashlight on the right.
I compare everything to the KillzoneFlashlights.com 219b BLF-348 because it’s inexpensive and has the best tint!
Conclusion
What I like
- Simple UI
- AAA format (with alkaline/NiMH support)
- TIR optic beam profile
- No strobe!
- Square-cut, high-quality threads
What I don’t like
- No Nichia option
Notes
- This content originally appeared at zeroair.org. Please visit there for the best experience!
- For flashlight-related patches, stickers, and gear, head over to PhotonPhreaks.com!
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