Skip to content

Fyber Kit BT Package

$195.00 Regular price
Fiber Type
1-Year Limited Warranty (included)


3050mAh 18650 Battery Front

2500mAh 18650 Battery

Each replaceable battery provides 3-9 hours of continuous use at full brightess.

Bitwhip Accessory

BitWhip Accessory

The brightest light whip on the planet! [140 Fiber Version].

Jupiter Rope Green

Jupiter Rope Accessory

Our latest innovation, a flexible glowing rope.



*This product is available for pre-sale orders only. Your order will ship around June 25th. Any other products ordered with this product will ship together.

Ants on a Melon App Release Dates

Ants on a Melon App Compatibility

  • iOS 17.0, or later
  • Android 7.0, or later


Fyber Kit BT Package - The All-New App-Controlled Color-Changing Flashlight!

The Fyber Kit BT is a fiber optic kit that is perfect for any DIY futuristic fashion costume or creative project. This Kit includes our RGB Critter BT Flashlight and a twist on accessory made up of 360 end-glow fiber optic fibers that are all 6 feet long. 

The fiber optics are made of high-grade durable material, so they’ll hold up to all kinds of wear and tear. If you’re a costume designer or prop-maker, you’ll love the infinite possibilities of the Fyber Kit!

The RGB Critter BT color-changing flashlight powers the Fyber Kit Accessory, so all you have to do is twist the accessory into the RGB Critter BT and turn it on.




Sparkle Fibers

Sparkle fibers show tiny twinkling lights along the length of the end glow fibers. Sparkle Fibers are more prone to breaking. Please be gentle with the Sparkle Fiber version of the Fyber Kit to avoid unwanted breakage of fibers.


Multiple Connected Devices Issue Notice

The Ants on a Melon App enables users to simultaneously connect up to 10 RGB Critter BT Flashlights. However, it is important to note that there is a known issue with color-changing modes when multiple Critter BTs are connected to the app. The colors may not always match perfectly on the connected flashlights. This issue only applies to color-changing modes, as solid colors will always match on any number of connected RGB Critter BTs. A resolution for this known issue is expected by the end of 2024. Once the issue is resolved, you will be able to update your RGB Critter BT using the app.


How does the RGB Critter BT Flashlight (torch) attach to the accessories?

Where can I find tutorials for the RGB Critter BT Product Line?

What is the difference between the Fyber Kit and the BitWhip?

How should I store my fibers?

Can I get my fibers wet?

My fibers are curling or straightening too much. What can I do?

Over 200 Twist-On Accessories

Explore more than 200 accessory options, suchas flow toys and light painting tools, which interlock effortlessly and securely.


BitWhip Package

Easily the brightest light whip on the planet, the BitWhip is a super durable fiber optic whip made from super soft end-glow fibers that are cut into layered lengths of up to 5.5 feet


Light Painting Tools

The RGB Critter is widely recognized as the best color-changing flashlight for light painting applications. We have a selection of 150+ twist-on Light Painting Tools, including Light Painting Blades (featured here).


Double-Sided Sabers

Connect 2 Critters back-to-back to create a double -sided Modular Sol Saber or Modular Lumi Saber.


Fyber Kit Package

The Fyber Kit is a fiber optic kit that is perfect for any DIY futuristic fashion costume or creative project.


Color Changing Buttons

Our new RGB button technology provides a
vibrant display of colors.

New No-Slip Silicone Grip

Experience enhanced control with our new no-slip
silicone grip, designed to provide a secure hold
in any situation.

Analog Technology

The RGB Critter BT includes our breakthrough PWM/
Analog Technology. For light painters, an Analog signal
drive unlocks the most vivid visuals possible.

USB-C Charging Port

Replaceable 18650 battery included.
Up to 9 hours of use per charge.

New Silicone Modular Cap

Protect your RGB Critter and Modular
Sabers from accidental drops. Patent Pending.

Technical Specifications

Replaceable 2500mAh 18650 battery

Internal USB-C charging

Aluminum Body


3 illuminated RGB buttons

connects to over 200 twist-on accessories

  • Length 5.9" (150mm)
  • Diameter 1.3" (33mm)
  • Weight 9oz
  • Max Lumens 170lm
  • 18650 Battery 2500mAh
  • Warranty 1-Year Limited Warranty (optional 3-Year add-on)
Compatible with iPhones and iPads
RGB Critter BT Android App Coming July 2024

RGB Critter BT Reviews

The RGB Critter BT improves upon what was already the best RGB colour changing flashlight available for light painting photographers and flow artists.


The RGB Critter BT improves upon what was already the best RGB colour changing flashlight available for light painting photographers and flow artists. The app control makes the Critter BT much easier to control than the Critter 2.0 once the devices are connected. Programming new or editing existing effects presets is also very easy.

iOS June 2024 Android (beta) July 2024


Introducing RGB Critter BT, the app-controlled color-changing flashlight. Connect your RGB Critter BT to our new Ants on a Melon app and play!

Available For Pre-Order 4/26