ZebraLIght H604d Headlamp, wide beam, 5000K neutral light with high color rendering

ZebraLight H604d Headlamp—Powerful and Precise Lighting for Any Situation

It’s no coincidence that ZebraLight flashlights are among the best in the world. No frills—just tools refined to perfection, made for people who understand what true performance is.

If you're looking for a powerful headlamp that checks all the boxes—power, efficiency, control, and reliability—the ZebraLight H604d is one of the few that delivers all of this without compromise.

Why ZebraLight Is Considered One of the Best in the World

• Extreme efficiency—maximum energy output from the battery with virtually zero losses, thanks to the best buck-boost drivers on the market
• High color rendering (High CRI 93–95) — critical for distinguishing true colors, for example when working on electrical installations
• Constant-current driver—stable light output without dips or flickering
• Compact design—real power in a pocket-sized package
• Precise control—easy to use, yet highly customizable
• Unibody design—the case is crafted from a single piece of aluminum with CNC precision
• Type III Hard Anodizing—approximately 2 to 3 times more resistant to abrasion than standard flashlights
• Potting compound – the electronics are encapsulated in thermally conductive silicone for improved durability, cooling, and water resistance

What is the ZebraLight H604d suitable for?

• Professional use—security, inspections, technical work
• Touring and Camping—An Excellent Balance Between Power and Range
• Hunting and Fishing – Good Coverage and Neutral Lighting with Realistic Colors
• EDC (Everyday Carry) — a compact yet serious tool
• Emergency Situations – Reliability and Long Battery Life in Low-Power Modes
• Search and Navigation – Consistent Brightness

Classification of the ZebraLight Series

• SC Series – Handheld Flashlights (EDC, All-Purpose)
• H Series – Headlamps (Work, Hiking)
• HI – longer range with a more focused beam
• F / Flood – wide-area lighting for a more comfortable work environment
• c/w (CRI) – better color rendering with neutral light

All models share the same philosophy: a simple interface with extensive customization options and maximum efficiency.

Technical Characteristics and Specifications

LED

• Model: Cree XHP50.2 Neutral White LED
• Correlated Color Temperature (CCT): 5000K
• Typical Color Rendering Index (CRI): 93–95
• Shade variation: 3-step

Lighting Levels

• 3 main levels: High, Medium, and Low
• Each main level can be programmed to one of its two sub-levels
• The second sub-level can be further programmed with different brightness levels

Luminous flux and operating time

High:

• H1: 1,616 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
• 4 Hz Strobe – H1
• 19 Hz Strobe – H1

Electrical Specifications

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

Beam Type

• Wide (flood) beam with a frosted lens
• Beam angle: 120°

Dimensions and Weight

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

Features and Protections

• PID temperature control for the three highest levels
• Built-in battery protection features—continuous monitoring of temperature, current, and voltage
• Low-voltage protection: 2.7 V
• Battery level indicator—the LED flashes 1–4 times when clicked 4 times briefly
• Automatically switches from High to Medium and from Medium to Low when the battery is low
• Durable electronic button with a soft-touch finish
• Intuitive interface for quick access to all modes
• Precision CNC-machined one-piece housing made of high-grade aluminum
• Direct connection of the LED board to the housing for better cooling
• Type III Class I hard anodized coating
• Sealed and potted control electronics
• Tempered optical glass
• Protection Against Reverse Battery Installation
• Water resistance: IPX8 (2 m / 30 min.)

ZebraLight H604d Controls

The flashlight has 3 main modes (High, Medium, Low) and a Beacon/Strobe mode. Each main mode has 2 sub-modes, and the second sub-mode can be further programmed.

Basic operations:

• 1 click: Turn High On / Turn Off
• 2 clicks: Sign up for Medium
• 3 clicks: Turn on Beacon/Strobe
• Hold (>0.6 sec): Low → Medium → High cycle, release at the desired level

Advanced settings:

• Hold: Always cycles from Low to High, regardless of the current level
• Double-click: Switch between the two sub-levels of the current level (this setting is retained 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 changes the brightness
• 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 the off state: 3 clicks
• Double-click: Switch between Beacon and Strobe modes
• The settings are saved

PID Thermal Tuning (for the highest levels):

1. Turn off the flashlight on H1, then turn it back on to H1
2. Hold down the button and cycle from Low to High 6 times
3. On the 7th cycle, release the button:
   • High: +1°C (up to +5°C max)
   • On Medium: Resetting to Factory Settings
   • Low: -1°C (down to -5°C max)

Group Modes

The flashlight 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 saved when the device is turned off or 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 setting):

• H1: 1,616 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 sequences of 5 / 6 / 7 clicks → resets the respective group to factory settings

Accessories Included

• 2 O-rings
• Pocket clip
• Headband with an adjustable top strap and a black silicone clip

Frequently Asked Questions