ZebraLight H600Fc Mk IV – a powerful headlamp with a wide beam and neutral light

It’s no coincidence that ZebraLight ranks amongst the world’s best headlamps. No frills, but refined down to the last detail. Reliable to a fault.

If you’re looking for a headlamp that truly meets your needs for power, efficiency, control and reliability – ZebraLight delivers without compromise. This is a tool for people who understand what real performance means.

Why ZebraLight is among the best in the world

Extreme efficiency – maximum battery output with virtually zero losses, thanks to top-of-the-range buck-boost drivers
High colour rendering (High CRI 93–95) – critical for working on electrical installations and distinguishing 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 – a simple interface with 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 resistant to wear and tear from friction in a pocket with coins or tools compared to a standard torch
Potting compound – the electronics are encapsulated in thermally conductive silicone for impact resistance, improved cooling and water resistance

What is the ZebraLight H600Fc Mk IV headlamp used for?

Professional use – security, inspections, technical work
Hiking and camping – 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 – consistent brightness

LED and light characteristics

The headlamp uses a Cree XHP50.2 Neutral White LED with a nominal colour temperature of 4000K, a colour rendering index (CRI) of 93–95 and a 3-step colour deviation.

The beam type is wide (floody) with a frosted lens and a beam angle of 90°.

Light output levels and runtime

High

H1: 1568 lm (PID, 2.5 hours)
H2: 980 lm (PID, 2.9 hours) / 562 lm (PID, 3.1 hours) / 296 lm (5.3 hours)

Medium

M1: 143 lm (12.5 hours)
M2: 63 lm (27.5 hours) / 25.7 lm (2.7 days) / 9.6 lm (7.1 days)

Low

L1: 3.3 lm (17.5 days)
L2: 1.0 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

Headlamp controls

The headlamp has 3 main levels (High, Medium, Low) and a Beacon/Strobe mode. Each main level has 2 sub-levels, the second of which can be further programmed.

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 and 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 setting)

H1: 1568 lm
H2: 980 / 562 / 296 lm
M1: 143 lm
M2: 63 / 25.7 / 9.6 lm
L1: 3.3 lm
L2: 1.0 / 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

Technical specifications

Parameter	Value
Brand	ZebraLight
Model	H600Fc Mk IV
Category	High-output headlamp
LED	Cree XHP50.2 Neutral White
Colour temperature (CCT)	4000K
Colour rendering index (CRI)	93–95
Colour deviation	3-step
Maximum luminous flux	1568 lm
Beam type	Wide (floody), frosted lens
Beam angle	90°
Operating voltage	2.7 V – 6.0 V
Power supply	1 x 18650 Li-ion, flat-top, unprotected (not included)
Standby current	Negligible (significantly lower than the battery’s self-discharge rate)
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
Water resistance	IPX8 (2 m / 30 mins)
Low-voltage protection	2.7 V
Thermal regulation	PID (for the three highest levels)
Housing finish	Type III Hard Anodising Class I
Housing material	High-quality aluminium, CNC-machined, unibody
Glass	Tempered optical glass
Electronics	Sealed and encapsulated with thermally conductive silicone
Number of main modes	3 (High, Medium, Low) + Beacon/Strobe
Number of mode groups	3 (G5, G6, G7)
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 type of battery does the ZebraLight H600Fc Mk IV use, and is it included in the pack?

The headlamp operates on 1 x 18650 Li-ion flat-top battery without built-in protection. The battery is not included in the kit and must be purchased separately. The torch’s operating voltage is between 2.7 V and 6.0 V, ensuring compatibility with high-quality 18650 cells. The standby current is negligible – significantly lower than the battery’s self-discharge rate – which means the torch will not drain the battery during prolonged storage.

What does High CRI mean and why is it important for the ZebraLight H600Fc Mk IV?

CRI (Colour Rendering Index) is a measure of how realistically light renders the colours of objects compared to natural sunlight. The ZebraLight H600Fc Mk IV achieves a CRI of 93–95, which is exceptionally high. This is critically important when working on electrical installations, as it allows for the clear distinction of cable colours. It is also useful for hunting, fishing and navigation, where accurate colour perception is of practical importance. The colour temperature of 4000K provides neutral, natural light – neither too warm nor too cool.

How are the modes on the ZebraLight H600Fc Mk IV controlled?

Control is via an electronic button with a soft-touch finish. One click activates High mode, two clicks – Medium, and three clicks – Beacon/Strobe. Holding the button down for over 0.6 seconds activates a cycle through Low → Medium → High; releasing the button stops the cycle at the desired level. A double-click switches between the two sub-levels of the current level. The torch has 3 main levels, each with 2 sub-levels, and the second sub-level can be further programmed by pressing the button twice six times in succession. The settings are retained even when the battery is replaced.

Is the ZebraLight H600Fc Mk IV waterproof?

Yes. The headlamp is IPX8-certified, which means it is protected against submersion to a depth of 2 metres for 30 minutes. The control electronics are sealed and encased in thermally conductive silicone (potting compound), which contributes to its water resistance, impact resistance and improved cooling. The pack includes 2 spare O-rings to maintain the seals during regular use.

What is PID thermal regulation and how does it work on the ZebraLight H600Fc Mk IV?

PID (Proportional-Integral-Derivative) thermal control monitors the torch’s temperature and automatically reduces brightness in the event of overheating to protect the LED and electronics. On the H600Fc Mk IV, this is active for the three highest brightness levels. The user can adjust the thermal intervention threshold themselves: by following a special procedure involving 6 cycles from Low to High; on the 7th cycle, releasing the button on High increases the threshold by +1°C (maximum +5°C), on ‘Medium’ it resets it to the factory setting, and on ‘Low’ it reduces it by -1°C (maximum -5°C). This provides control over the balance between maximum brightness and thermal protection.

What is included in the ZebraLight H600Fc Mk IV kit?

The pack includes: the headlamp itself, 2 spare O-rings, a pocket clip, a headband with an adjustable top strap and a black silicone holder, as well as a user manual. The 18650 Li-ion battery is not included and must be purchased separately. The headband allows it to be worn as a headlamp, whilst the pocket clip allows it to be used as a standard handheld torch.

How durable is the ZebraLight H600Fc Mk IV’s body?

The body is precision-machined using CNC technology from a single piece of high-quality aluminium (unibody design), which eliminates weak points at joints. It is coated with Type III Hard Anodising Class I – approximately 2 to 3 times more resistant to wear and tear from friction in a pocket with coins or tools compared to a standard torch. The LED board is connected directly to the body for more efficient cooling. The lens is optically tempered. The torch also features built-in protection against reverse battery insertion.