Haikelite HK04 SST40 (2019) review

4 x Luminus SST40 LEDs
9000 lm output
180625 cd intensity
3 x 18650 Li-Ion batteries

The Haikelite HK04 SST40 (HK04SST40) released in 2019. It uses 4 x Luminus SST40 LEDs, SMO reflector and 3 x 18650 Li-Ion batteries. The powerful emitter in this flashlight provides up to 9000 lm output, 180625 cd intensity, and a beam distance of 850 m.

The memory function is a nice feature, the light will remember the last used mode. It has a strobe function, which is one of the most effective self defense tools available. The HK04 SST40 flashlight is rechargeable easily via USB port.

Table of contents:

Haikelite HK04 SST40 (HK04SST40) specifications

NameHK04 SST40
Rated 4/5 based on 1023 user votes.


The aluminium body of flashlight treated with a Type III hard-anodized, anti-abrasive finish.

Weight370 g
Length140 mm
Body diameter46 mm
Head diameter56 mm
Materialaluminium alloy with HAIII hard-anodized finish


The emitter of HK04 SST40 manufactured by Luminus, a US-based LED manufacturer. The HK04 SST40 has a smooth reflector. The properly focused smooth reflector gives you a more cohesive hotspot and therefore throws better. It has an AR coated lens.

Emitter4 x Luminus SST40 LEDs
Color temperature5000 K, 6500 K
Lenstoughtened AR coated glass
Switchelectronic side


The throw is the calculated distance in meters at which the flashlight produces a light intensity of 0.25 lux. The candela per lumen (cd/lm) ratio can be used to determine if a flashlight has a spot or flood type beam. Well-focused spot beams can be over 100 cd/lm, tactical flashlights are typically between 20-100 cd/lm, and work lights are less than 10 cd/lm.

Flux9000 lm
Intensity180625 cd
Throw850 m
CD/LM factor20.07


The HK04 SST40 has mode memory. Mode memory means that the light will remember the mode you were using when the light was last turned off, and when you turn it on again. The ramping mode of the HK04 SST40 is intuitive, and lets you seamlessly ramp the output up and down over almost the entire output range. The HK04 SST40 is tactical strobe ready. The strobe light is disorienting to the person it is aimed at which makes it difficult for them to concentrate. It has the SOS beacon function for an emergency situation. The SOS flashes Morse code so you can signal for help when needed.

Mode memoryyes
Ramping modeyes


The battery indicator lets you know when the battery is low, charging, or fully charged. This flashlight can charge the battery with an integrated charger, and it works with any USB power source. This flashlight has a built-in low voltage protection (LVP) to prevent damage to the cell from over-discharge, so protected cells are not necessary. The built-in thermal control automatically adjusts brightness output to prevent overheating.

Battery3 x 18650 Li-Ion batteries
Battery indicatoryes
Charger portUSB Type-C
Thermal regulationyes


The lanyard prevents accidental loss of the flashlight.

Package contents2 x spare o-rings
USB Type-C cable

The performance of the Haikelite HK04 SST40 flashlight is measured according to the ANSI / NEMA FL1 Standard 30 seconds after switching the light on. The ANSI/NEMA FL1 2009 Standard is a set of flashlight performance guidelines.

The specifications above are based on the official data published by the manufacturer, but we also take user reviews into consideration. If you found an error or something lacking in the specifications above for the Haikelite HK04 SST40, then don’t hesite and signal the problem to us.

Haikelite HK04 SST40 (HK04SST40) pictures

Haikelite HK04 SST40 / HK04SST40 photo Haikelite HK04 SST40 / HK04SST40 photo Haikelite HK04 SST40 / HK04SST40 photo Haikelite HK04 SST40 / HK04SST40 photo
Haikelite HK04 SST40 / HK04SST40

Haikelite HK04 SST40 (HK04SST40) comparisons

According to our statistics, the Haikelite HK04 SST40 flashlight was most often compared on our site with the following flashlights.

Haikelite HK04 SST40
Haikelite HK04 SST40
vs Sofirn Q8 Plus
Sofirn Q8 Plus
Weltool T5 Stumpy Tiger
Weltool T5 Stumpy Tiger
vs Haikelite HK04 SST40
Haikelite HK04 SST40
Armytek Dobermann Pro XHP35
Armytek Dobermann Pro XHP35
vs Haikelite HK04 SST40
Haikelite HK04 SST40
Eagtac G3V XHP35
Eagtac G3V XHP35
vs Haikelite HK04 SST40
Haikelite HK04 SST40

If there’s information about the Haikelite HK04 SST40 that you would like to see on this site, then write to us.

FlashlightChart.com / Flashlights / Haikelite / Haikelite HK04 SST40 (2019)
Back to Top