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Packaging
Light came packed in a cardboard box, with plastic placeholders inside.

Contents
1x Olight T20-M
1x Spare rubber button cap
1x Nylon wrist strap
1x Nylon holster
2x Spare rubber o-rings

Construction

There are currently 2 new versions of the T20, the T20-M and T20-T which are both physically identical. The Olight T20-M is a solidly built light, with good ergonomics and a solid structure. As you can see from the image to the right, the head houses a unique reflector cup which is half smooth and half textured. The smooth surface area reflects a highly focused hot spot for optimal throw, while the textured surface area smoothens out any artifacts in the spill region of the beam profile. Its an innovative take on reflector design and produces a beam that is characteristic of Olight products. The emitter is just slightly off-center, but not by much. On the exterior, the head has a thin band of checkered knurling which provides some grip when you're twisting the head. The Type 3 hard anodized coating is smooth and consistent throughout, free of scratches or smudges. The threads on the head are a similar to those on the Fenix lights, not too thin or too thick relative to its overall size. There may be some squeaking initially due to some machining dust stuck between the threads, but a quick clean with a stiff bristled brush will fix this. The threads on the head also sometimes cross-threaded during my tests, however I don't think this would be much of a problem since you wouldn't need to completely remove the head while using the T20-M. The head's exterior is of a hexagonal shape which serves as an anti-roll feature.

The battery tube has a simple and clean looking design. There's only one flat face machined onto the tube, which is where the Olight branding is printed on. There is a band of knurling about 2cm wide for additional grip. The area towards the end is slightly slimmer, this provides good ergonomics for when you're holding the light in a cigar/pistol grip. The walls of the T20-M's battery tube is thinner than either the T10 or T15 models. The battery tube is wide enough to accommodate even the thickest 16340 cells without problem. While almost identical to the original T20, the T20-M has a raised ring machined towards the end of the battery tube which makes it easier to hold in a cigar grip. As with the head, coating on the battery tube is just as well done. Very smooth and consistent. The threads between the battery tube and the tail cap are cut very smooth. I noticed that the more force you apply while screwing on the tail cap, the higher the chances of it getting cross-threaded. Otherwise, it screws on perfectly fine and smooth. The tail has a hexagonal design similar to the head and provides good grip when unscrewing the tail cap for battery changes. Housed inside the tail cap is a forward push button switch module, thus allowing for momentary activation. Everything from its tension and positive tactile feedback, to the clicking sound it makes is identical, which is a good thing. The T20-M isn't able to tail stand since the switch cap protrudes out slightly from the tail cap.


Output

The user interface of the T20-M is unlike the original T20. While the original had its brightness levels controlled by head twists and strobe/S.O.S. selection done by half-presses, the T20-M has both brightness and strobe/S.O.S. selection done by head twists. This is a logical change since the T20-M uses a forward push button switch, so any of the levels/modes can be turned on momentarily. The electronics in the T20-M works perfectly fine with all types of battery configurations which can physically fit into its battery tube. The T20-M uses a Q5 bin Cree XR-E emitter as standard. The color temperature on my sample is slightly cool. The spot is well-focused and the spill beam is smooth without artifact thanks to its unique reflector design. There is a slight dark area right in the middle of the hotspot, but its not noticeable in practical use.

Operating modes are as follows:
Off > Level 1 (7 lumens) > Level 2 (60 lumens) > Level 3 (220 lumens) > Strobe > S.O.S.

I've also included runtime graphs comparing the relative 220 lumens level of the T20-M and T20-T.


Conclusion

The Good - Very well built and finished. Provides a well-focused spot while still having a smooth, artifact-free spill beam. Holds excellent regulation well while providing good runtime with 2x 16340 or CR123 cells.

The Bad - Regulation not as good with 1x 17670 cell.

The Relative - Half textured and half smoothened reflector provides a unique beam profile. Beam's color temperature is slightly cool. Uses a forward push button. Unable to tail stand.


Comments

Gallery (in order of assembly)

Head (front view).

Head (side view).

Head (rear view).

Battery tube (front view).

Battery tube (side view).

Battery tube (rear view).

Tail cap (front view).

Tail cap (side view).

Tail cap (rear view).


Olight T20-M
March 09, 2008
Overall
7.6

Construction
    8.0
Output
    8.5
Value
    6.5

Availability
BatteryJunction.com
Beam Profile
Tight Spot
Coating
Type 3 Anodizing
Cost
$89.95
Dimensions
12.8cm long
2.5cm at widest Ø
Lens
AR Coated Glass
Light Source
Cree XR-E
Output
2x 16340 750mAh AW Protected
Level 1 Spot

243 Lux

Level 1 Spill 11 Lux
Level 2 Spot 1075 Lux
Level 2 Spill 48 Lux
Level 3 Spot 4380 Lux
Level 3 Spill 205 Lux
1x 17670 1600mAh AW Protected
Level 1 Spot

248 Lux

Level 1 Spill 12 Lux
Level 2 Spot 1106 Lux
Level 2 Spill 50 Lux
Level 3 Spot 4440 Lux
Level 3 Spill 207 Lux
2x CR123 1500mAh e²
Level 1 Spot 244 Lux
Level 1 Spill 11 Lux
Level 2 Spot 1088 Lux
Level 2 Spill 49 Lux
Level 3 Spot 4410 Lux
Level 3 Spill 219 Lux
Power
2x 16340
1x 17670
2x CR123
Reflector
Smooth/Textured Aluminum
Runtime
2x 16340 750mAh AW Protected
Level 1 ~30 Hours
Level 2 06:24 to 50%
Level 3 00:59 to 50%
1x 17670 1600mAh AW Protected
Level 1 ~50 Hours
Level 2 11:10 to 50%
Level 3 01:59 to 50%
2x CR123 1500mAh e²
Level 1 ~70 Hours
Level 2 14:53 to 50%
Level 3 02:02 to 50%
Switch
Forward Push Button