Dereelight Night Master V2 (NM800)

Specifications

Brand/model Dereelight Night Master V2 (NM800)
LED 1*Cree XP-G2? dedomed
Maximum lumens ? lm
Maximum beam intensity 106,000 cd
Maximum throw ? m
Battery 1*18650 Li-ion, 2*CR123A
Onboard charging No
Material Aluminium
Modes On
Blinkies No
Reflector Aspheric zoom lens
Waterproof IPX8
Review date August 2022

Introduction

My brother asked if I could review his decade old Dereelight Night Master V2 hunting torch to see how it performs. I think he bought the torch from someone on a forum where they may have dedomed the LED to improve the beam distance or they swapped the pill for one with an LED that has a better throw.

Dereelight designed their torches to have a pill that can easily be unscrewed and swapped without needing to use a soldering iron or a hot plate to swap the LED. I like looking at torches from the 2010s. They have some innovative and unique designs.

Torch in use

The Night Master V2 can be mounted on a rifle by using a scope clamp.

A glossy finish makes the torch a little bit slippery but aggressive knurling and a cigar grip keep it secure in hand.

A forward clicky mechanical tailswitch with a glow-in-the-dark boot can be half pressed to momentarily turn the torch on or it can be clicked to turn on and off.

The beam distance and width can be adjusted by unscrewing the lens at the head of the torch slightly. There is a sweet spot where the beam throws a long way but in practice you would want to adjust the beam to match the target distance, e.g. 100 metres, rather than always have it set to hit over 700 metres.

The tailcap has a small lanyard hole.

The button is slightly recessed so that so that the torch can tailstand.

There were probably more accessories that came with the torch originally but I do not have them here for review.

Night Master V2 side

Build quality

The torch is made of aluminium. Threads are anodised and have two o-rings each.

The glow-in-the-dark switch boot fits well and has a checkered grip pattern.

The whole torch can be disassembled. I have not noticed any glue. There are heaps of o-rings. This may be a modders dream host.

There is a spring and brass ring in the head that connect to the battery tube.

The brass pill can be easily unscrewed with tweezers.

Night Master V2 button Night Master V2 threads Night Master V2 tube Night Master V2 tailcap Night Master V2 driver Night Master V2 driver spring

LED, bezel, lens and beam

The Night Master V2 appears to have a dedomed Cree XP-G2 on a 2MT-S pill behind an aspheric zoom lens.

The massive bezel unscrews to allow the aspheric lens to be removed.

Dereelight sell various pills with different emitters to allow people to more easily swap the emitter without needing to use a soldering iron or hot plate. They recommend using tweezers to unscrew the pill.

Night Master V2 emitter Night Master V2 lens

I have taken Correlated Colour Temperature (CCT) and Colour Rendering Index (CRI, RA of R1-R8) measurements with the Night Master V2 positioned two metres away from an Opple Light Master Pro III (G3).

The CCT is around 5200K and it has a 60+ CRI.

The Delta u, v is positive (slightly green tint).

Mode CCT (K) CRI (Ra) x y Duv
Zoomed out 5702 67.6 0.3277 0.3490 0.0061
Zoomed in 4785 62.1 0.3547 0.3846 0.0121

Calculate Duv from CIE 1931 xy coordinates

The beam is pretty interesting on a white wall. It has a square hot spot and circles around it due to the aspheric lens.

Night Master V2 zoomed out wall Night Master V2 zoomed in wall

Dimensions and size comparison

Dimensions

I took the following measurements using digital callipers.

Measurement Unit (mm)
Torch length 160.0
Head diameter 54.1
Tube diameter 25.1

Weight

I took the following measurements using a digital scale.

Weight Unit (g)
Torch with battery 283.0
Torch 235.7
Battery 47.3

The battery measured here is a Panasonic NCR18650GA 3450mAh Li-ion battery.

Size comparison with its competition

From left to right: Sofirn C8L, Dereelight Night Master V2, EagTac T25C2.

Sofirn C8L, Dereelight Night Master V2, EagTac T25C2

From left to right: Sofirn C8L, Dereelight Night Master V2, EagTac T25C2.

Sofirn C8L, Dereelight Night Master V2, EagTac T25C2

User interface

The Night Master V2 has a forward clicky tailswitch to turn the torch on and off. That’s it. It is very simple.

This is a zoomie torch where the head can be unscrewed to adjust the focus of the beam.

State Action Result
Off Click On
Off Half press Momentary On
On Click Off

Low voltage protection

The light goes extremely dim as the 18650 battery voltage goes down to 2.53V after 13 hours. The battery may become damaged if the voltage goes below 2.50V and it could become a fire hazard when you charge it. When the light goes dim, it is a good indication that the battery needs to be charged.

The torch turned off at around 2.40V when I connected the torch to a bench power supply and reduced the voltage from 4.20V to 2.0V. However, a current of 80 µA continued to be drawn. You could kill an 18650 battery if you accidentally left the torch turned on for several weeks.

PWM

I did not notice any visible PWM (flickering).

Lockout

The torch can be mechanically locked out by unscrewing the tailcap slightly.

Batteries

The Night Master V2 supports various batteries depending on whether you use an extension tube.

1x 18650, 2x CR123A, 2x protected RCR123.

3x CR123A with an EXT500 extension tube.

2x protected 18650 with an EXT650 extension tube.

An unprotected flat top Samsung 30Q 18650 did not work. This may be due to the short spring at the positive end of the tube.

An unprotected flat top Panasonic NCR18650GA worked well.

Night Master V2 positive adapter 1 Night Master V2 positive adapter 2 Night Master V2 positive adapter 3

Performance

I charged a Panasonic NCR18650GA 3450mAh Li-ion cell to 4.20V and used it for testing.

Lumen measurements

I used a UNI-T UT210E clamp meter to measure the current at turn on.

Mode Amps at start Lumens @turn on Lumens @30 sec Lumens @10 min
Zoomed out 1.84 A 231 lm 209 lm 200 lm
Zoomed in 1.84 A 175 lm 168 lm 179 lm

Parasitic drain

None. It has a mechanical tailswitch so the battery is completely disconnected.

Runtime graphs

I built a lumen tube and forked bmengineer’s project RuTiTe to add support for a VEML7700 light sensor and MCP9808 temperature sensor with help from Owen. Calibration lights from maukka were used.

Note: Lumen measurements may be off by more than 10% with my DIY lumen tube. Temperature may vary due to the room temperature and it may be lower than expected due to how I attached the sensor.

Measurements were taken in my office where the ambient temperature may fluctuate between 6C and 21C during winter.

Night Master V2 zoomed in runtime graph

Night Master V2 zoomed out runtime graph

The runtime is decent. After 2 hours the light output drops in half and continues to drop until 4 hours 30 minutes. The torch will run for over 10 hours with a significantly reduced light output, at this point the 18650 battery needs to be charged.

Throw

I took lux measurements with a UT383BT after 30 seconds at a distance of five metres with the torch zoomed out and then zoomed in.

Mode Specs (cd) Specs (m) Candela measured (cd) Distance (m)
Zoomed out - - 30,275 347
Zoomed in 106,000 cd - 128,750 717

Beamshots

5000K WB, f3.2, 3.2" shutter speed, ISO 100

Zoomed out
Night Master V2 zoomed out beamshot

Zoomed in
Night Master V2 zoomed in beamshot

Conclusion

I honestly thought the Night Master V2 would be blown out of the water by more modern throwers but it still holds its own. A 347 to 717 metres throw and 2 hours of runtime before the light output is reduced by half is pretty good.

Pros:

  • Good build quality.
  • No glue.
  • Easy to modify (swap the LED).

Cons:

  • Regulation could be improved.

Product page

Product page