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Lumens are a measure of the total amount of visible light from a light source. The higher the lumen rating the “brighter” the light will appear.
“I'd say it's probably the most impressive head torch I've ever used.” Road.cc
“I'd say it's probably the most impressive head torch I've ever used.” Road.cc
The Bilby 400 Headlamp has been designed from the ground-up for serious outdoor adventure. It’s powerfully bright, tough, intuitive and sets a new standard for multi-purpose headlamps.
An innovative and award-winning design that champions your needs above all else. Bilby's exceptional balance, comfort and feature-set will impress.
- Powerful beam reaching up to 330 ft
- Waterproof to 3 ft with an IP67 rating
- USB rechargeable via integrated connector
- Multiple light options & electronic tilt-function
- Boost mode for when you really need to light things up
- Battery indicators so you're never caught out
- Easy-clean, anti-odour single-piece silicone strap
- Programmable modes with Knog's Modemaker app

The 5 LEDs on the Bilby are optimally placed for their individual purposes. A Spot beam for distance, two elliptical beams for Mid and Wider angles, a Red light for night light purposes and Downlights for reading.
MODE | MAX LUMENS | RUNTIME |
Boost Right | 400 | 5 hrs |
Boost Left | 240 |
9 hrs |
Spot |
200 | 14 hrs |
Mid |
200 | 14 hrs |
Wide |
48 | 22 hrs |
Red | 7 | 32 hrs |
Reading | 10 | 17 hrs |
For maximum brightness, use Boost Right (both Spot + Mid) to get 400 lumens for an impressive 5 hrs. For the longest runtime of 105 hours, use the Mid LED on the lowest brightness setting.
Free shipping within US mainland on orders over $50 and just $6 on orders under $50. We'll ship it asap, and have it delivered within 2 - 4 business days.
Returns & Exchanges
We stand behind everything we make and want you to be happy. If for any reason you're not satisfied with your purchase, return it within 30-days for a full refund. We'll even pay the shipping. For more information, please see our Returns & Warranty page.
Shipping on Knog's US website is available to US mainland customers only. If you're shopping from another location, please visit our international store.
I bought my first Bilby 400 as part of the Kickstarter campaign and I have bought the Bilby for friends and family ever since. This last purchase was for my son who is a life-long runner and rower, and for my daughter-in-law!
I had been given one of these already. I love it so much I just ordered three more! to share the Bilby story with my nearest and dearest!
Bright and easy to work. just what i needed
I am using Knog lights on my bike for quite a while, but with my last order I decided to buy a Bilby 400 Headlamp for running. I was never satisfied with the headlights I had so far and didn't expect too much. Bilby is the best headlight for running. Great experience, thank you!
What a relief having got one of these headlamps to realise that they leave the competition in their wake. Sleek, stylish, easy to charge, these head lamps are just amazing. 10 / 10