Powerful ZebraLight H600d Mk IV headlamp – neutral light with a CRI of 90+

It’s no coincidence that ZebraLight headlamps rank amongst the best in the world. No frills, but refined to perfection. Reliable to the extreme.

If you’re looking for a headlamp that ticks all the boxes – power, efficiency, control and reliability – the ZebraLight H600d Mk IV delivers without compromise. This is a tool for people who understand what real performance means.

Why ZebraLight are among the best in the world

Extreme efficiency – maximum battery life with virtually zero power loss, thanks to some of the best buck-boost drivers on the market
High colour rendering (CRI 90+) – critical for electrical installation work, to distinguish the true colours of cables
Constant-current driver – stable light output without dips or flickering
Compact design – real power in a small package
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 abrasion than a standard torch
Potting compound – the electronics are encapsulated in thermally conductive silicone for durability, improved cooling and water resistance

What is the ZebraLight H600d Mk IV suitable for?

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

LED and colour rendering

LED: Cree XHP50.2 Neutral White LED
Colour temperature (CCT): 5000K
Typical CRI: 90+
Colour temperature adjustment: 3-step

Brightness Levels and Modes

The torch 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.

Luminous flux and runtime

High

H1: 1616 lm (PID, 2.5 hours)
H2: 1,010 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

Operating the ZebraLight H600d Mk IV

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): Low → Medium → High cycle; release at the desired level

Advanced operations and configuration

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

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

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

Battery indicator

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

Beacon / Strobe mode

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

PID thermal adjustment (for the three 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 (or subsequent) cycle, release the button:
- On High: +1°C (up to a maximum of +5°C)
- On Medium: returns to factory setting
- On Low: -1°C (up to -5°C maximum)

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 selection is retained when the torch is switched off and when the battery is replaced.

General rules (for all groups)

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 available brightness levels
6 double-clicks: enter programming mode
Double-click: +1 level
Triple-click: -1 level
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	H600d Mk IV
Category	High-output headlamp
LED	Cree XHP50.2 Neutral White LED
Colour temperature	5000K
CRI	90+
Maximum luminous flux	1616 lm
Beam type – central	17° (hot spot)
Beam type – peripheral	80° (spill)
Operating modes	High (H1/H2), Medium (M1/M2), Low (L1/L2), Beacon, Strobe
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
Glass	Corning Gorilla Glass
Reflector	Orange peel texture
Head diameter	24.2 mm
Length	97.8 mm
Weight (excluding battery)	39 g
Weight (with battery)	84.6 g
Weight (with battery and headband)	124.6 g
Housing	Unibody – made from a single piece of aluminium, CNC-machined
Electronics	Sealed and encapsulated with thermally conductive silicone
Temperature control	PID (for the three highest levels)
Automatic shut-off	At 2.7 V
Reverse battery polarity protection	Yes
Battery included	Not included

Frequently asked questions

What type of battery does the ZebraLight H600d Mk IV use?

The torch operates on 1 x 18650 Li-ion flat-top battery without a built-in protection circuit. It is important to use a battery without a protection module, as protected models may not fit inside the casing. The battery is not included in the pack and must be purchased separately. The torch’s operating voltage is between 2.7 V and 6.0 V. If the voltage drops to 2.7 V, the torch switches off automatically to protect the battery from over-discharge.

What does CRI 90+ mean and why is it important?

CRI (Colour Rendering Index) is a measure of how accurately light renders the true colours of objects. A value of 90+ indicates very high colour rendering, close to that of natural sunlight. This is particularly important for technical work – for example, when distinguishing the colours of electrical cables. Aside from work, neutral light with a high CRI is easier on the eyes and provides a more realistic view when hunting, fishing and hiking. The ZebraLight H600d Mk IV torch features a Cree XHP50.2 LED with a colour temperature of 5000K and a CRI of 90+.

How long does the ZebraLight H600d Mk IV last on low modes?

At the lowest programmable level, L2, the torch can run for up to 5.4 months at a luminous flux of 0.08 lm. At level L2 at 1.06 lm, the runtime is around 2 months, and at 0.3 lm – around 3.8 months. Level L1 provides 3.4 lm for 17.5 days. These figures make it exceptionally suitable for emergency situations and prolonged use in conditions where access to recharging is limited. The torch automatically reduces its brightness when the battery is low – from High to Medium and from Medium to Low.

Is the ZebraLight H600d Mk IV waterproof?

Yes, the torch has an IPX8 waterproof rating, which means it can withstand submersion to a depth of 2 metres for 30 minutes. The electronics are additionally sealed with thermally conductive silicone (potting compound), which provides protection not only against water but also against impacts. The body is made from a single piece of aluminium (unibody design) with a hard Type III Class I anodised finish. All this makes it suitable for use in the rain, in damp conditions and near bodies of water.

How do you switch between the modes on the ZebraLight H600d Mk IV?

It is controlled via a single electronic button. One click switches on High mode or turns the torch off. Two clicks activate Medium mode, whilst three clicks activate Beacon/Strobe mode. Holding the button down for more than 0.6 seconds starts 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 mode, and the selection is retained even when the battery is replaced. The torch also features 3 mode groups (G5, G6, G7), accessible with 5, 6 or 7 clicks from the off position.

Can the ZebraLight H600d Mk IV be used as a work headlamp?

Yes, it is particularly well-suited for professional use. The high colour rendering index (CRI 90+) allows for accurate colour differentiation – important for electrical engineering and inspection tasks. The constant-current driver ensures stable, flicker-free light, which reduces eye strain during prolonged use. The compact unibody housing with Type III anodised finish is built to withstand daily use. Corning Gorilla Glass provides additional protection for the optics. The torch weighs just 39 g without the battery, making it comfortable to carry throughout the working day.

What is PID thermal regulation and how does it work on the ZebraLight H600d Mk IV?

PID (Proportional-Integral-Derivative) thermal regulation monitors the body temperature and automatically reduces the power output if the torch becomes excessively hot. This applies to the three highest brightness levels. The user can set the desired temperature threshold via a specific sequence of button operations. When held down and cycling through 6 cycles from Low to High, on the 7th cycle releasing the High button adds +1°C to the threshold (up to a maximum of +5°C); the setting on ‘Medium’ reverts to the factory setting, and on ‘Low’ it is reduced by 1°C (to a maximum of -5°C). The system works in conjunction with the direct connection of the LED board to the aluminium housing for improved cooling.