BUSTER 400 /

Universal Companions

Rechargeable bike light with brake light function

On the way to work or school or on a racing bike tour, this bike light keeps you safe in the dark seasons of the year. The BUSTER 400 rechargeable front light features 400 lumens, a beam range of 120 meters, and a burn time of up to 30 hours. Five pre-set profiles make it even more convenient to use. Simply select the profile that is just right for the current requirements and then simply switch between modes that you actually need at the moment. LED indicators on the top show you exactly how much power the light still has. The BLAZE FLASH rear light has a visibility range of 500 meters and up to 50 hours of operation. Its brake light function and two flashing modes make you even more visible. The integrated brightness sensor automatically activates the bike light when visibility conditions are poor.


Versatile thanks to five light modes


Lumens ≤ 400
Burn time ≤ 2 h


Lumens ≤ 200
Burn time ≤ 4 h


Lumens ≤ 100
Burn time ≤ 9 h


Lumens ≤ 300/400
Burn time ≤ 5 h


Lumens ≤ 100
Burn time ≤ 25 h

Sometimes you need all your light’s power on dark trails, and other times you just want to be seen – the BUSTER 400 has the right solution for any biking situation. You can choose from five different modes to adjust luminosity and battery life.


Only the modes that you need

The BUSTER 400’s five pre-set mode profiles make it very easy to use. You can select the profile that is just right for your requirements and then simply switch between modes to the one you need at the moment. For instance, there is a commuter profile displays only Night Flashing and Day Flashing modes; racing and training rides will benefit from High Mode and Day Flashing Mode.

The light with a memory

The memory function ensures that the BUSTER 400 lights up just the way it was when you shut it off – in the same mode and with the same profile selection. The profile also always stays the same as your last selection. This makes it easy for anyone to get started quickly.

Battery indicator provides an overview

The BUSTER 400 lets you keep an eye on the battery level at all times. During the ride, the six-level LED indicator continuously displays the power left in your light. When it is shut off, a short click on the On/Off button is enough to check the battery level. While charging with the USB-C cable, you can tell from the LEDs how much progress has been made. After just three hours, the BUSTER 400 is completely charged.

Compact and lightweight

Light Guide improves your lateral visibility

The SIGMA logo on the longitudinal sides of the BUSTER 400 functions as a Light Guide. This is not only a visual highlight, but also provides significantly greater lateral visibility in traffic, enhancing safety. This lets vehicle drivers and others on the road see you better.

Osram LED for a perfect lighting pattern

In urban traffic or on fast rides on roads, the BUSTER 400 keeps you from missing anything in the dark. The high-quality, high-power Osram LED and the converging lens developed specially by SIGMA gives the BUSTER 400 very even light distribution across the entire lighting pattern.


The BUSTER 400 can be mounted on the handlebars in a matter of seconds thanks to the silicone bracket. It can be positioned horizontally or vertically as needed so that it can be perfectly positioned for curved handlebars. The power light has a quick release so that it can be stowed quickly and compactly. The integrated slider allows the BUSTER 400 to be pushed on and removed conveniently. The SIGMA bike bracket fits on handlebars of 22-35 mm diameter.

Double-click for light

You can turn on the BUSTER 400 with a double click. This function ensures that you can put the light in your pocket without any trouble and without inadvertently switching it back on. A long press on the On/Off button shuts to device off again.

Ready to go even when it is wet

The BUSTER 400 keeps going even in bad weather! It is resistant to splash water in accordance with the international IPX4 standard. This means that riding to work or taking the racing bike out for a spin is no problem, even during wind and weather.


There is a universal helmet bracket for retrofitting the BUSTER 400. With this mount, the light will stay securely on your helmet – even on very bumpy night rides!

Video tip


A special adapter for the SIGMA Short and Long Butlers lets you attach the BUSTER 400 – or an action camera – right under the bike computer. This keeps you cockpit neat and clean. The adapter is available as an accessory in the online shop.


Four light modes – plus the brake light

Auto sensor

Visibility range ≤ 500 m
Burn time ≤ 9 h

Manual continuous light

Visibility range ≤ 500 m
Burn time ≤ 9 h


Visibility range ≤ 500 m
Burn time ≤ 11 h


Visibility range ≤ 500 m
Burn time ≤ 50 h

Brake light

Visibility range ≤ 1500 m
Burn time ca. 3 s

The BLAZE FLASH has four modes to choose from. In addition to the static continuous light, there is the auto sensor light, which activates automatically when it gets dark thanks to the brightness sensor. Another highlight is the two flashing modes, Pulse Flash and Eco Flash. In all options, the acceleration sensor triggers the brake light for about three seconds. This rear light is guaranteed to draw the attention of the person behind you in traffic in plenty of time!

Brake light for day and night

An integrated brake light for more safety: Three bright LEDs signal braking to others on the road for about three seconds thanks to the integrated acceleration sensor. The brake light can be used during the day without being continuously lit, giving you more visibility in road traffic. It is also an extremely helpful feature for group rides.

Automatically well-lit

Always visible when you need to be: In Auto mode, the integrated brightness sensor detects the ambient light and automatically switches the rear light on and off as needed. This saves battery charge and is ideal for situations such as passing through tunnels or riding on dark forest roads.

Long-lived flash modes

The BLAZE FLASH not only is able to light up constantly, but also has two innovative flash modes. Pulse Flash with its three pulsing red LEDs lasts for eleven hours, drawing attention to the cyclist. Eco Flash lasts even longer (up to 50 hours) with one flashing red LED. The ability to switch to an energy-saving mode is very useful, especially on long tours.


The BLAZE FLASH rear light has an integrated battery. It is charged via the Micro-USB socket, which can also be used with any PC. The supplied Micro-USB cable can be used to charge the rear light completely in three hours. This saves money and protects the environment.

Battery/charge indicator

Flexible mounting

The silicone strap included in delivery can be used to attach the BLAZE FLASH to all common seat posts quickly and without tools, so it can be used with different bikes.


The BLAZE FLASH rear light is protected against splashing water according to the international IPX4 standard, making it eminently suited to inclement weather conditions.


Art.No.: 19620

UVP: 59,95 

Out of Stock

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Features & functions - BUSTER 400

General (Lightings)
Beam range 120 m (Basis ANSI Nema FL1)
Run time 2 h in High mode, 3 h in Mid mode, 9 h in Low mode, 5 h in Night flashing mode, 30 h in Day flashing mode
Maximum light output 400 lumens
Charge time 3 h
Charge indicator Five-stage charge indicator Six-stage battery indicator
Integrated charge function Charging possible during operation
Lighting modes Five light modes: High (400 lm), Mid (200 lm), Low (100 lm), Night flashing (300/100 lm) Day flashing (100 lm)
Light battery status Short button press shows the battery status
Mode Five pre-set mode profiles Mode memory function
Lighting type Osram LED
Side visibility Light Guide for excellent side visibility
Splash resistant In accordance with IPX4
Adjustable bracket 360° Silicone mount with quick release
Tool-free mounting
Switch on protection Double click for ON
Weight 107 g (incl. bracket)

Features & functions - BLAZE FLASH

General (Lightings)
Visibility range 500 m
Run time 9 h (Standard), 11 h (Puls flashing), 50 h Eco flashing
Charge time 3 h
Charge indicator Two-stage battery indicator
Integrated charge function Micro USB charge function
3 LED brake light function
Side visibility
Splash resistant In accordance with IPX4
Tool-free mounting with flexible silicone mount
Weight 22 g
Day and night mode

Service - BUSTER 400

  • Tutorial videos

  • Service Contact


  • FAQ

  • Service Contact

Accessories - BUSTER 400

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Accessories - BLAZE FLASH

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