A Review of the NiteCore i4000R Tactical Flashlight

Just so you, the reader, know, I do not own the featured image on this page. Rather it is the property of NiteCore, a Chinese manufacturer of tactical grade flashlights.

I have stated it several times before and I will gladly state it again:

Flashlights made by NiteCore are the best flashlights to come out of Mainland China and quite possibly, the best products to come out of Mainland China period.

I have been a fan of NiteCore flashlights since mid-2017 when I purchased the MT06 tactical penlight.

In January of 2018, I subsequently purchased a NiteCore MT20A and in the latter parts of that year, wrote a review of it.

Then in April of 2020, I purchased a NiteCore i4000R from the Special Administrative Region of Hong Kong on eBay and it took over a month to arrive in my mailbox. That said tactical flashlight is what this piece will be a review thereof.

In the time it took for this flashlight to traverse its warehouse in Hong Kong to my mailbox on the outskirts of Houma, Louisiana, I was getting quite annoyed and anxious. I was also paranoid about it being contaminated with the Novel 2019 SARS Coronavirus. Still, I was quite excited when it finally arrived. Immediately, I charged up the battery and when it was full, I began carrying it in my backpack.

The NiteCore i4000R boasts a maximum light output of 4,400 Lumens-that is over four times brighter than a standard household 60 Watt bulb!

It is top-heavy and also features a crenelated strike bezel, which can be deployed in defending oneself.

If that weren’t enough, the tactical strobe feature has a constantly changing strobe pattern, making it even more effective as a self-defense weapon.

This flashlight is primarily marketed to law enforcement, but can also give peace of mind to any civilian who knows how to use a flashlight for self-defense. Furthermore, it can be carried in places where “true” weapons (such as guns and knives) are downright forbidden because legally it is not a weapon!

On an ordinary day, I will usually carry my Streamlight Junior LED flashlight.

However, if I expect any sort of trouble, I will carry my NiteCore i4000R.

I have never had to use it as a weapon, but I know it will give me at least some degree of peace.

I have used my Streamlight Junior halfway as a weapon, when confronting someone knocking on my door or my neighbor’s door at a strange hour. I must admit that both times, the person knocking was harmless and someone we knew, but they were disoriented and stepped back at least a few feet. My Paw Paw, God rest his soul, taught me the tactic of shining a bright flashlight into the eyes of someone at the door, to disorient him or her. Of course, his flashlights of choice were those budget friendly 6 Volt lanterns and, if you, the reader, haven’t figured it out by now, my flashlights of choice are lightweight, compact tactical models. His flashlights put out 60-75 Lumens but in their defense, they had the Candlepower to back those Lumens up. My flashlights, on the other hand, put out hundreds and, in this case, a few thousand Lumens, but overall, don’t have the Candlepower to back those Lumens up. However, his flashlights likely would fail in a truly tactical situation, whereas mine would still be going strong.

Except for self-defense applications, this flashlight would likely be overkill for most civilians. However, to a flashaholic such as myself, this is one of the best flashlights I own. It was even used by me as a self-defense instrument in a dream I recently had.

By the way, this is on par with the best flashlights made here in The States and even those made in Germany!

I will go over some of the features and specifications, as listed by the company website:

As I stated before, the maximum output is 4,400 Lumens, provided by four independently controlled Cree XP-L2 V6 LED circuits.

…Bare with me, my back is starting to hurt tremendously. I’m about to take a Baclofen and chase it with some orange juice. Be right back…

…All right, I am back. It’s my ex-wife’s fault that I have this back injury because she insisted we make groceries on a rainy day, and of course, trying to be a good husband, I gave in to her request, but then I slipped and fell down some wet stairs and though I didn’t know it at the time, I ruined my lower back muscles from the impact of the fall. Now I cannot even write at length, much less almost any other form of work that which I was qualified to do, because of this injury. Of course, she likely feels no guilt about this because she hated the overwhelming majority of my written content…

So with that 4,400 Lumens is a throw of 230 Meters or ~755 Feet and beam intensity of 13,300 Candlepower. According to the company website, this amount of light given off by this illumination instrument is “ideal for law enforcement, assault operations, self defense, search and patrols.”

Also, according to the company website, further elaborating on the four independently controlled LED circuits, which are, “Powered by a constant current circuit to provide durable usage with guaranteed safety.”

The featured rechargeable battery is a NiteCore patented 21700i Lithium-Ion battery.

The strobe featured can be instantly accessed by a dedicated button, even while the flashlight is off! I think this, aside from the tremendous amount of brightness if the best selling point of this flashlight.

And of course, there is the Advanced, Randomly Changing Strobe, which I think is the second best selling point! Human eyes are unable to adapt to the strobe.

There is an anti-impact reverse polarity protection system, which makes this ideal to be used mounted on a firearm!

The flashlight has a built-in charging port that uses a standard USB-C connection and is covered by a metal ring.

Also featured is an advanced temperature regulation system that adapts to the ambient temperature.

Furthermore, there is a last used mode memory, power indicator light which is accurate down to one-tenth of a volt IP-68 water resistance and a 1-meter drop impact resistance.

Finally, the lens is crystal-coated and scratch resistant and the Aerospace Aluminum body is has a military-grade HA-III hard-anodized finish!

The physical specifications are:
Tube Diameter: 25.4 millimeters or 1 inch.
Head Diameter: 32.6 millimeters or 1.28 inches-this makes the flashlight top-heavy and therefore excellent for striking in self-defense tactics.
Tail Diameter: 28 millimeters or 1.1 inches.
Overall Length: 159 millimeters or 6.26 inches-short enough to carry concealed in most hip pockets.
Total Weight: 135 grams or 4.76 ounces or just over a quarter of a pound-will not weigh the end-user down, even for a long period on foot.

The brightness levels are as follows:
Turbo Mode: 4,400 Lumens, 13,300 Candlepower, 230 Meters or ~755 Feet Beam Distance and 30 Minute Runtime.
High Mode: 1,100 Lumens, 3,300 Candlepower, 115 Meters or ~377.3 Feet Beam Distance and 2 Hour, Fifteen Minute Runtime.
…My back is starting to hurt again, but if I take another Baclofen it will be the third one in a twenty-four-hour period…
…I will try and press on but I am in a great deal of pain!…
Mid Mode: 330 Lumens, 930 Candlepower, 61 Meters or ~200.13 Feet Beam Distance and 7 Hour, 45 Minute Runtime.
Low Mode: 50 Lumens, 160 Candlepower, 25 Meters or ~82 Feet Beam Distance and 40 Hour Runtime.
Ultra-Low Mode: 2 Lumens, 4 Candlepower, 4 Meters or~13.12 Feet Beam Distance and 380 Hour Runtime.

By the way, I used the previously reviewed Texas Instruments TI-36 X Pro to convert some of these Metric Units into English Units!

I typically use it whenever I need to express any such measurement in both English and Metric units for my product reviews!

Included Accessories:
NTH20 Tactical Holster-designed specifically for law enforcement and also compatible with MOLLE systems.
CR123 Battery Magazine-in case the rechargeable battery is depleted and there is no charging source nearby.

While I do carry this flashlight in my EDC backpack, I have only carried it on my person for any given amount of time quite sparingly. The last time I carried it was because I had spotted a shady young man walking around my church at night. We were finishing up our evening Bible Study and Prayer Meeting and it does get dark this time of year, but I was escorting two ladies (a mother and daughter) home on foot and did not trust this fellow as far as I could throw him. Thank God, while I was holding the flashlight and ready to deploy it as a defensive weapon, I did not have to. My God is more effective than any weapon ever created! I could think of a handful of other times I was ready to deploy this flashlight but didn’t have to.

All in all, I definitely like this flashlight and I wish American companies could make something of this caliber but at an affordable price.

I give this product a 4.95 out of 5 stars only because I wish the tactical tail switch was better recessed to prevent accidental activation.

Other than that keep up the good work, NiteCore! As much as I hate to admit it, your company is beginning to put American and even German-made flashlights to shame!

I guess this, therefore, concludes my review of the NiteCore i4000R Tactical Flashlight. I hope you, the reader, have been informed, illuminated and maybe even entertained. May God richly bless you!

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