ZebraLight H600c Mk IV – a headlamp with a wide beam and neutral 4000K light

It is no coincidence that ZebraLight ranks amongst the world’s best headlamps. With no unnecessary frills, yet every detail is meticulously crafted. Reliable to the point of fanaticism – that is the philosophy behind every model.

If you’re looking for a headlamp that truly meets your needs for power, efficiency, control and reliability – the ZebraLight H600c Mk IV is one of the few that delivers without compromise. This isn’t a gadget designed for show. It’s a tool made for people who understand what real performance means.

Why ZebraLight is among the best in the world

Extreme efficiency – maximum energy output from the battery with virtually zero losses, thanks to some of the best buck-boost drivers on the market
High colour rendering (CRI 90+) – critical when working on electrical installations to distinguish the true colours of cables
Constant-current driver – stable light output without dips or flickering
Compact design – real power in a pocket-sized format
Precise control – simple to use, yet offering extensive customisation options
Unibody design – the body is machined from a single piece of aluminium
Type III Hard Anodising – approximately 2 to 3 times more wear-resistant than a standard torch when rubbed against coins or tools in a pocket
Potting compound – the electronics are sealed with thermally conductive silicone for impact resistance, improved cooling and water resistance

Who is the ZebraLight H600c Mk IV suitable for?

Professional use – security, inspections, technical work
Hiking and camping – an excellent balance between power and battery life
Hunting and fishing – good beam pattern and neutral light with more realistic colours
EDC (everyday carry) – a compact yet robust tool
Emergencies – reliability and long battery life on low settings
Search and navigation – stable brightness

ZebraLight series – a brief overview

SC series – handheld torches (EDC, general-purpose)
H series – headlamps (work, hiking)
HI – longer range, more focused beam
F / Flood – wide illumination, more comfortable
c/w (CRI) – better colour rendering, neutral light

All models share a single philosophy: a simple interface with extensive customisation options and maximum efficiency.

LED and colour rendering

LED: Cree XHP50.2 Neutral White LED
Correlated Colour Temperature (CCT): 4000K
Colour Rendering Index (CRI): 90+
Colour temperature adjustment: 3-step

Lighting levels and operating times

The torch has 3 main modes – High, Medium and Low. Each main mode can be programmed to one of its two sub-modes. The second sub-level of each main level can be further programmed with different brightness levels.

High

H1: 1616 lm (PID, 2.5 hours)
H2: 1010 lm (PID, 2.9 hours) / 579 lm (PID, 3.1 hours) / 305 lm (5.3 hours)

Medium

M1: 147 lm (12.5 hours)
M2: 65 lm (27.5 hours) / 26.4 lm (2.7 days) / 9.9 lm (7.1 days)

Low

L1: 3.4 lm (17.5 days)
L2: 1.06 lm (2 months) / 0.3 lm (3.8 months) / 0.08 lm (5.4 months)

Beacon / Strobe modes

Beacon 0.2 Hz – Low
Beacon 0.2 Hz – H1
Strobe 4 Hz – H1
Strobe 19 Hz – H1

Electrical Specifications

Operating voltage: 2.7 V – 6.0 V
Battery: 1 x 18650 Li-ion, flat-top, unprotected (battery not included)
Standby current: negligible – significantly lower than the battery’s self-discharge rate

Beam type

Wide (floody) beam with frosted lens
Beam angle: 90°

Dimensions and weight

Head diameter: 24.2 mm
Length: 97.8 mm
Weight (torch only): 39 g
Weight with ZL635 battery: 84.6 g
Weight with ZL635 battery and headband: 124.6 g

Technical specifications

PID thermal regulation for the three highest levels
Built-in battery protection with continuous monitoring of temperature, current and voltage
Low-voltage protection: 2.7 V
Battery capacity indicator – LED flashes 1 to 4 times, activated by 4 short clicks
Automatic downgrading from High to Medium and from Medium to Low when the battery is low
Durable electronic button with a soft-touch finish
Intuitive user interface for quick access to all modes
Precision CNC-machined one-piece casing made from high-quality aluminium
Proprietary cooling system – direct connection between the LED board and the body
Type III Class I hard anodised coating
Sealed and encapsulated control electronics
Tempered optical glass
Protection against reverse battery installation
Water resistance: IPX8 (2 m / 30 mins)

ZebraLight H600c Mk IV controls

The torch has 3 main modes (High, Medium, Low) and a Beacon/Strobe mode. Each main mode has 2 sub-modes, with the second sub-mode being further programmable.

Basic operations

1 click: Switch to High / Switch off
2 clicks: Switch to Medium
3 clicks: Switch to Beacon/Strobe mode
Hold (>0.6 sec): Cycles through Low → Medium → High; release to select the desired level

Advanced settings

Hold: Always cycles from Low to High, regardless of the current level
Double-click: Toggle between the two sub-levels of the current level (remembered even when the battery is replaced)

Programming the second sub-level (H2 / M2 / L2)

At the selected level: 6 consecutive double-clicks
Each subsequent double-click switches to a different brightness level
1 click: exit and save

Battery indicator

From the off state: 4 quick clicks
The LED flashes 1 to 4 times, indicating the remaining charge

Beacon / Strobe mode

From off: 3 clicks
Double-click: switch between Beacon and Strobe modes
Settings are saved

PID thermal setting (for the highest levels)

Switch the torch off at H1, then switch it back on at H1
Hold the button and cycle 6 times from Low to High
On the 7th cycle, release the button:
- On High: +1°C (up to +5°C max)
- On Medium: returns to factory setting
- On Low: -1°C (up to -5°C max)

Mode groups

The torch has 3 mode groups: G5 (factory setting), G6, G7.

5 clicks from OFF: G5
6 clicks from OFF: G6
7 clicks from OFF: G7

The settings are retained when the torch is switched off and when the battery is replaced.

General rules (applicable to all modes)

H = H1 or H2
M = M1 or M2
L = L1 or L2
From OFF: 1 click → High | 2 clicks → Medium | Hold → Low → Medium → High

G5 (factory group)

H1: 1616 lm
H2: 1010 / 579 / 305 lm
M1: 147 lm
M2: 65 / 26.4 / 9.9 lm
L1: 3.4 lm
L2: 1.06 / 0.3 / 0.08 lm

G6 and G7

All levels (H1, H2, M1, M2, L1, L2) can be programmed to any of the 12 brightness levels
6 double-clicks: enter programming mode
Double-click: up
Triple-click: down
1 click: exit

Reset

3 consecutive series of 5 / 6 / 7 clicks → resets the relevant group to factory settings

Contents of the set

2 x O-rings
Pocket clip
Headband with adjustable top strap and black silicone holder
User manual

Specifications	Price
Brand	ZebraLight
Model	H600c Mk IV
Category	Headlamp
LED	Cree XHP50.2 Neutral White LED
Colour temperature (CCT)	4000K
Colour rendering index (CRI)	90+
Maximum luminous flux	1616 lm (H1)
Beam type	Wide (floody), frosted lens
Beam angle	90°
Operating modes	H1, H2, M1, M2, L1, L2, Beacon, Strobe
Number of main levels	3 (High, Medium, Low)
Power supply	1 x 18650 Li-ion, flat-top, unprotected
Operating voltage	2.7 V – 6.0 V
Water resistance	IPX8 (2 m / 30 mins)
Coating	Type III Hard Anodising, Class I
Housing material	High-quality aluminium (Unibody)
Head diameter	24.2 mm
Length	97.8 mm
Weight (excluding battery)	39 g
Weight with ZL635 battery	84.6 g
Weight with ZL635 battery and headband	124.6 g
Contents of the pack	Headlamp, 2 x O-rings, pocket clip, headband with adjustable top strap and black silicone holder, user manual

Frequently asked questions

What is the maximum output of the ZebraLight H600c Mk IV and how long does the battery last?

The maximum light output is 1616 lm in H1 mode with a runtime of 2.5 hours. In H2 mode, there are three options: 1,010 lm (2.9 hours), 579 lm (3.1 hours) and 305 lm (5.3 hours). At medium levels, M1 provides 147 lm for 12.5 hours, whilst M2 offers 65 lm (27.5 hours), 26.4 lm (2.7 days) and 9.9 lm (7.1 days). The lowest settings, L1 and L2, can run for up to 5.4 months at 0.08 lm. The battery is 1 x 18650 Li-ion, flat-top, unprotected and is not included in the pack.

Why is a CRI of 90+ important when choosing a headlamp?

The Colour Rendering Index (CRI) indicates how accurately the light reproduces the true colours of objects. With a CRI of 90+, colours appear almost identical to those in daylight. This is particularly crucial when working on electrical installations, where you need to clearly distinguish the colours of the cables. The H600c Mk IV’s neutral 4000K light is easy on the eyes and suitable for prolonged use. When hunting or fishing, it provides a more realistic view of the terrain and the colour of the lures.

How do you set the brightness levels on the ZebraLight H600c Mk IV?

The torch has 3 main levels – High, Medium and Low, each with two sub-levels (H1/H2, M1/M2, L1/L2). To switch between sub-level 1 and sub-level 2, use a double-click – the setting is saved even when the battery is changed. To programme the second sub-level, press the button twice in quick succession six times at the selected level; thereafter, each subsequent double-click cycles through a different brightness level. A single click exits the mode and saves the selected setting. In groups G6 and G7, all 6 sub-levels can be programmed to any of the 12 available brightness levels.

What is PID thermal control and why is it useful?

PID thermal control monitors the temperature of the housing and automatically reduces the brightness in the event of overheating to protect the LED and the electronics. It is active for the three highest operating levels. The user can adjust the temperature threshold themselves – from off to H1 – by holding down the button and cycling through 6 Low-High cycles. On the 7th cycle: releasing the button whilst on High increases the threshold by 1°C (up to a maximum of +5°C); on Medium, it resets to the factory setting; and on Low, it decreases the threshold by 1°C (down to a maximum of -5°C). This provides precise control over thermal management.

What is the water resistance of the ZebraLight H600c Mk IV and how is it achieved?

The torch is IPX8-certified, meaning it can be submerged to a depth of 2 metres for 30 minutes without damage. Its water resistance is the result of a combination of factors: the control electronics are hermetically sealed and encapsulated in thermally conductive silicone (potting compound); the body is constructed as a single piece of aluminium (unibody design) and is protected by a hard Type III Class I anodised coating. The tempered optical glass further seals the construction. This protection makes it reliable for fishing, working in the rain and in damp environments.

What is included in the pack and what type of battery is required?

The kit includes: the headlamp itself, 2 O-rings, a pocket clip, a headband with an adjustable top strap and a black silicone holder, and a user manual. The battery is not included – 1 x 18650 Li-ion, flat-top, unprotected battery is required. The weight of the headlamp alone is 39 g; with a ZL635 battery, it is 84.6 g; and with the battery and headband, it is 124.6 g. The headband allows the H600c Mk IV to be used as a fully-fledged headlamp with an adjustable top strap.

How does the battery indicator work and what safeguards are in place for low battery levels?

From the off state, 4 quick clicks activate the battery indicator. The LED flashes between 1 and 4 times depending on the remaining charge – more flashes indicate a higher charge. When the voltage reaches a critically low level (2.7 V), the torch activates a safety feature. It automatically reduces the brightness from High to Medium and from Medium to Low when the charge is low, to extend the operating time. The built-in protection circuits constantly monitor temperature, current and voltage. Standby power consumption is negligible – significantly lower than the battery’s self-discharge rate.