Nitecore LR12 Review (Built-in Diffuser)


The LR12 is essentially the larger sibling of the LA10 (AA version) – that now takes a 1*18650/2*CR123A batteries instead.

Probably the most unique feature for this LR12 would be its versatility to be both a flashlight and lantern, with the built-in (lipstick style) diffuser.

Let’s check out the merits and demerits of this flashlight.

Packaging & First Impressions

This is what the light will come with as shown below.

  • The threads and o-rings were well lubricated. Threads were smooth and clean (no gritty feeling at all) – great for twisty lights.
  • Ample threads for a twisty light to remove any likelihood of the tailcap unscrewing off from the body and dropping off by accident.
  • Twisting action to extend/retract the diffuser is smooth (no gritty feeling).
  • Anodizing of the light is uniform without any missing specs.
  • No clip and/or holster is provided.
  • The provided lanyard is able to support the full weight of the light and should hold up to the test of time.
  • The strong magnetic tail cap is able to bear the flashlight’s weight when attached horizontally and vertically (upside down) to a flat ferrous metallic surface.
  • Battery compartment is able to take a KeepPower 18650 3400mAh battery with barely much room to take a slightly thicker battery width. Fatter protected 18650 3500mAh batteries should be able to fit without issue as well.
  • Scanning the QR code with your phone/tablet on the box’s back would bring up the Nitecore LR12’s product page.






Box Contents:

Quick Overview (Manufacturer Specifications)

  • Body Material: Black HAIII Aluminium
  • LED: XP-L V6 Bin
  • Battery Format: 1 x 18650 or 2 x CR123A ONLY
  • Output & Runtime (with 18650 3.7V 3500mAh battery):
    • Low (1 lumen / 900h)
    • Mid (60 lumens / 24h)
    • High (230 lumens /  6h)
    • Turbo (1000 lumens /  1h) – there is a temperature-based output step down
    • Beacon (1000 lumens)
  • Max Beam Distance: 166m
  • Beam intensity: 6,900cd
  • Waterproofness: IPX-8 (2m)
  • Impact Resistance: 1m
  • Dimension: 106.2mm (length) x 26.9mm (body diameter)
  • Weight: 78.5g (excluding batteries)
  • Battery reverse polarity protection
  • Accessories Included:
    • 1*Lanyard
    • 1*Spare O-ring
  • MSRP: ~$50

UI (User Interface)

UI for this light is perfect for Every Day Carry (EDC) as it is rather straightforward to use.

Switching ON and OFF is done by twisting the tail of the light, so no momentary activation is possible. UI operation is a two-hand process due to the flashlight twisty switch and diffuser/lantern extension/retraction operation being on top of each other (as seen in the picture below). For one-handed operation, activating the flashlight twisty switch would activate the diffuser/lantern extension as well and vice versa.

Flashlight UI

From OFF:

  • 1 * Twist (Tail Clockwise) – Direct access to LOW.

From ON:

  • 1 * Twist (Tail Anti-clockwise) – Light will switch OFF.
  • 1* Twist (Tail Anti-clockwise & Clockwise within ~2 sec) – Mode change (light cycles through LOW, MID, HIGH, TURBO & BEACON).
  • 1* Twist (Tail Anti-clockwise & Clockwise >~2 sec) – Light will switch back to LOW.

There is no mode memory for this flashlight, it will always start in LOW.

Diffuser/Lantern UI

This is what makes this flashlight truly unique – the built-in diffuser.

  • Twist (Clockwise) – Diffuser/lantern is extended.
  • Twist (Anti-clockwise) – Diffuser/lantern is retracted.

The length of diffuser/lantern extended will determine the amount of beam profile’s spill being converted to diffused lighting.

Form Factor

For flashlights that are intended to use on a daily basis (EDC) or walking/hiking/camping usages and for possibly a long period of time, form factor is extremely important.

Right from the get-go, the LR12 would be thicker than most 18650 flashlights due to the accommodation of the built-in diffuser. That said, the light feels well balanced and sits well in a medium sized hand (not head/tail-heavy). Switching between overhand and underhand holding method is easy with its form factor.

Due to the lack of knurling on most parts of the flashlight’s body, it tends to be rather slippery, especially with wet hands/gloves. Hence, using the included lanyard is recommended, to help mitigate this issue.

To include a built-in clip to improve form factor & carry method – would be a tricky issue for this twisty built-in diffuser/lantern flashlight (either bezel up or down) and is probably why Nitecore skipped on it.

It can tail-stand perfectly without the slightest wobble.

Note: the above 18650 size comparison picture depicts a Nitecore 18650 2600mAh battery (NL1826) next to the Nitecore LR12; it does not come with the flashlight.

Beam Style/Beamshots

For this light (diffuser/lantern retracted), the spill, corona and hotspot is somewhat predictable due to the fairly shallow Smooth Reflector. With the XP-L LED used, the beam is still sufficiently “throwy” for recognising items in the near to mid-range distance.

Even when the built-in diffuser/lantern is fully extended, the beam is still sufficiently “throwy” for recognising items in the near to mid-range distance.

The above beam profiles are a rough interpretation of what is seen when white wall hunting.

For Diffuser/Lantern Retracted – the beam has a rather distinct hotspot with some slight corona and a rather wide usable (almost circular) spill. It also helps that the XP-L LED is perfectly centred in this sample. There is a slight ring in the beam when white wall hunting but not visible in real world usage.

For Diffuser/Lantern Extended – the beam’s hotspot and corona are retained as when the Diffuser/Lantern is retracted. However, the spill portion of the beam is converted to diffused area lighting – as the length of diffuser/lantern being extended increases, the beam’s spill decreases which then causes an increase in diffused area lighting.

All of the beamshots taken below are done so with the following camera settings ([For Diffuser/Lantern Retracted OR Extended] LOW: 2.5 sec, F3.5, ISO100, 5000K WB, MID: 0.8 sec, F3.5, ISO100, 5000K WB, HIGH: 1/3 sec, F3.5, ISO100, 5000K WB, and TURBO: 1/6 sec, F3.5, ISO100, 5000K WB).
Some pictures have been adjusted slightly to depict as close as to what is seen in real life. The distance of the light from the door is 4.6m.

Diffuser/Lantern Retracted

Control shot:

LOW (1 lumen):

MID (60 lumens):

HIGH (230 lumens):

TURBO (1000 lumens):

Diffuser/Lantern Extended

Control shot:

LOW (1 lumen):

MID (60 lumens):

HIGH (230 lumens):

TURBO (1000 lumens):

Mode (Output) Spacing

Mode spacing appears to be progressively brighter to the eye and the modes are well spaced enough to be able to know which mode one is currently in. With that in mind, TLR tend to view mode spacing as battery life indicators (amount of runtime left) rather than the specific output (lumens).

The LOW mode of 1 lumen which is what most would call a moonlight mode, is perfect for night-adjusted eyes and midnight snack runs.

To some, the jump between the HIGH and TURBO modes might be too wide a gap and may wish for another mode level or a higher HIGH. However, we found that the HIGH mode to be just about perfect for lighting up a small room and could be left indefinitely in that mode – the flashlight barely feels warm to the touch after extended usage. This is one of the occasions when less is more but the TURBO mode is still available for lighting a larger room (gets warm due to its output) when needed.

Tint & CRI

Nitecore did not disclose the tint (color temperature) and/or the CRI (Color Rendering Index) for the LEDs used in their light. For this light, a guesstimate would be in the 6000K and 70CRI ballpark.

There are tint shifts throughout the beam profile. The hotspot is cool white whilst the corona possess a slight yellowish tint; and the spill having a slight purple tint.
This is however, not as noticeable in real life.

Nitecore introduced a High CRI version of the LA10 and we hope it will be the case for the LR12 as well.


The light was subjected to warm water submersion, followed by cold water submersion and left under room temperature running water tap whilst running on TURBO.

No signs of water intrusion in the head, switch or body was seen.

Lockout Capability

Being a twisty light, it has no electronic lockout but mechanical lockout is possible as needed, like during transportation in a bag.

A quarter turn (anti-clockwise) of the tail from ON will enable mechanical lockout.

Scale Comparison (Ruler)


To sum up, we believe that the most important part of any review is if given the chance to purchase the same light for our own EDC/usage or to gift to our loved ones out from one’s pocket (wallet), would we still do it?
For this light, it is an absolute YES, if the slightly bulkier form factor is not an issue for your usage.

The built-in diffuser sounded a little gimmicky at first but actually works like a charm. Being able to select just the right amount of diffused area lighting, made it both a lantern and flashlight at the same time. Needless to say, this is by far one of our favorite walking/treking/camping flashlight now.

For the perks that it brings, this flashlight requires 2 hands to operate and is slightly bulkier than most single 18650 flashlights.

As mentioned earlier, we look forward to the day that Nitecore introduces a High CRI LR12 model like they did for the Nitecore LA10 model.

Here is 2 bonus size comparison pictures with a highly recommended Nitecore headlamp – the Nitecore HC65, with both the Diffuser/Lantern retracted and extended.

As with all gears, two is one and one is none.

Stay safe,
The Lite Review

Disclaimer: Light and 18650 battery was provided for by Nitecore (manufacturer) for this review. No other compensation was provided.

Where to Buy Links

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Nitecore LR12

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Nitecore Chargers (3 Tests)

Since this flashlight does not have any in-built charging option, a proper 18650 charger would be required. As part of Nitecore’s charger safety awareness program, the following are the 3 tests that Nitecore chargers undergo during design phase.

  1. Flame Retardant Test
  2. High Temperature Test
  3. Dielectric Withstand Test

2 Replies to “Nitecore LR12 Review (Built-in Diffuser)”

  1. Azmi bin Rahim says: Reply

    How much?

    1. The MSRP for this flashlight is ~USD50.

      MSRP prices can be found under the “Quick Overview (Manufacturer Specifications)” section.

      The current actual price can be found under the “Where to Buy Links” section.

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