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Knog Bilby Headlamp



Fully loaded head torch boasting power and functions – comfortable, cool and clever, if just a bit complicated
Fun design
Long run-times
Huge range of options
Recharging tab position

At every product is thoroughly tested for as long as it takes to get a proper insight into how well it works. Our reviewers are experienced cyclists that we trust to be objective. While we strive to ensure that opinions expressed are backed up by facts, reviews are by their nature an informed opinion, not a definitive verdict. We don't intentionally try to break anything (except locks) but we do try to look for weak points in any design. The overall score is not just an average of the other scores: it reflects both a product's function and value – with value determined by how a product compares with items of similar spec, quality, and price.

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The Knog Bilby is a feature-loaded rechargeable head torch with a wealth of features and functions. It's light, bright and a typically Knog-ish funky take on the staid old head torch design. There are a couple of issues that mean it might not suit everyone in all circumstances, and the sheer range of lighting options can make it bewildering, but once you get to grips with it, it's a pretty impressive bit of kit.

How much can you pack into a head torch? In the case of the Knog Bilby, quite a lot. There is a mammoth selection of different functions and combinations available with five different individual lights: a central spotlight, a left mid light, a right wide light, a small red light and a downward-facing reading light. These can then be selected in four brightness settings: max, high, med or low. And there are also two further boost options, with a maximum output of 400 lumens. The only thing missing is a flash mode.

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As you would expect with Knog, in design terms it's all a perfect marriage between funky novelty and practical performance. The lights themselves are housed in a removable plastic body that sits in a substantial silicone headband. With a total weight of just 88g, it's comfortable, secure to wear and easy to adjust. It also comes in a range of four colours.

2021 Knog Bilby 400 Lumen Silicone Headlamp - strap detail.jpg

Thanks to its slim design, I can just about sneak it onto my forehead below a helmet, although you might want check this for yourself. (Whatever you decide, don't compromise the positioning of your helmet – it's there to protect your frontal lobe as much as anything, so no pushing back your lid just to accommodate a head torch, if you don't mind.)

If you do wear it beneath a helmet, you almost certainly won't be able to access the two buttons on the top of the Bilby's body that control operation. That's not a massive loss – cycling through the different functions and getting to grips with its capabilities are not the most satisfying parts of the Bilby experience. There are so many options, it's hard to know what you've selected if you can't see the light itself. In essence, the left button as you face the Bilby changes function, the right one changes brightness. But they can also be used to tilt the beam, switch everything off, engage boost modes, check battery status and lock or unlock the light. I've found it a bit confusing at times.

2021 Knog Bilby 400 Lumen Silicone Headlamp - button.jpg

When it comes to run-times, things are simpler – it's less a question of hours and minutes and more easily assessed according to different phases of the moon, the passing of the seasons, or even the length of Covid-inspired school closures. This little beauty really does keep on going. Knog says on full 400-lumens max boost output the Bilby should run for five hours. In reality it goes for more than nine, albeit with a slight drop in output after 10 minutes to prevent overheating (you can click it back into full max mode should you wish).

At other outputs you can get significantly longer. For example, the central spotlight at its normal high 200-lumen display will do a good 14 hours. And if you just want that same spotlight on low output, you'll get 105 hours of use. Yes, that's more than four days of constant use.

> Buyer’s Guide: The best front lights for cycling

Knog says the Bilby is 'the world's most powerful silicone headlamp' and I can quite believe it. At full 400-lumens boost mode it is dazzlingly bright and will highlight things at a fair distance (I reckon 100 feet/30 metres is easily possible). Even in the less extreme 200-lumen spotlight mode, you'll be able to pick things out at the roadside. When not on the bike, I found myself using the quite useful downward-facing reading light a lot, too.

2021 Knog Bilby 400 Lumen Silicone Headlamp - light detail.jpg

If I had any complaints about the lighting performance, it would be that the spread of light is quite wide, meaning the illuminating power is diluted somewhat and I couldn't really discern much practical difference between the different modes. That wouldn't necessarily be a problem if this was a dedicated front light, but with head torches, at least on full max power mode, I'd quite like a more focused, concentrated beam.

In any case, it's all pretty impressive. But once the life has finally expired from our plucky hero, we come to a slight flaw. To charge the integrated battery, you need to remove the light housing from the silicone headband with a simple unpeeling operation. You will then find the plastic light body is crescent shaped, with a USB recharging tab emanating at an angle from one end.

2021 Knog Bilby 400 Lumen Silicone Headlamp - detail.jpg

In theory this is very clever with no need for cables: just insert the tab into a USB charging plug and away you go. The problem is, if you're using a USB recharging plug such as the type that comes with a mobile phone, because of the Bilby's crescent shape, you might find the wall or plug socket surface gets in the way.

Some USB plugs are fine – although even then, the Bilby's charging tab has a tendency to slip out if vertically wall mounted, so I ended up using an old Knog USB lead with a female USB end to make sure we had a nice reliable charging experience. Recharging takes around four hours, with 75% charging seemingly coming after just a couple of hours.

Finally, waterproofing and dustproofing are top-notch – this is a hardy bit of kit.

Value and conclusion

Considering its relatively modest £50 price and its sheer range of functions and abilities, the Bilby certainly seems like very good value. There are other very good helmet-mounted – if not head-mounted – options available, but they tend to cost more.

For example, Simon thought the £69.95 made-in-Britain Exposure Link Daybright was a fab bit of kit that allows you to be seen and direct a beam where you want it. There's also the larger, heavier but more powerful Link Plus Daybright for £85. Or for £69.99 there's the Cateye Volt 400 Duplex which features 400-lumen top power with a 3-hour run-time.

Against this, the Knog looks like decent value, and I'd argue it has more real-world applications than 'just' a helmet torch. Indeed, I'd says it's probably the most impressive head torch I've ever used. It's feature packed and comfortable. But while it's easy to get around your head, it's not always quite so easy to get your head around all its functions.


Fully loaded head torch boasting power and functions – comfortable, cool and clever, if just a bit complicated

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Make and model: Knog Bilby Headlamp

Size tested: 400 lumens

Tell us what the light is for, and who it's aimed at. What do the manufacturers say about it? How does that compare to your own feelings about it?

This is a head torch designed for adventure sports folk and outdoor enthusiasts.

Knog says: "Simply put, the Bilby is the world's most powerful silicone headlamp. The Bilby produces a serious output of 400-lumens and offers an impressive five-hour runtime on full power, and over 105-hours on the lowest setting. It's lightweight, dust proof and waterproof to 1m (IP67 rating) and intuitively designed from medical-grade silicone to ensure durability while providing form-fitting comfort. The Bilby will suit the most serious outdoor enthusiast in the most demanding of situations."

Tell us some more about the technical aspects of the light?

Knog lists:

Five LED lighting options - spotlight, mid light, wide light, red light and a downward-facing reading light

Adjustable silicone headband

Five-hour to 105-hour run-times

USB recharging (recharging time four hours)

Compatible and customisable with Knog's Modemaker app

Rate the light for quality of construction:

Really well made – excellent silicone headband. Only the position of the USB recharging tab is a potential problem.

Rate the light for design and ease of use. How simple was the light to use?

Getting it to work isn't a problem, but getting your head round the different functions, modes and settings is a bit tricky. I'd say it's overcomplicated.

Rate the light for the design and usability of the clamping system/s

Great design – fits round the head securely.

Rate the light for waterproofing. How did it stand up to the elements?

Excellent – keeps water out very well despite its 'unpeelable' design.

Rate the light for battery life. How long did it last? How long did it take to recharge?

I thought battery life – considering its diminutive size – was incredible. And the four-hour recharge time is pretty good, too.

Rate the light for performance:

Very good performance, although I'd prefer a more direct beam on its max output setting.

Rate the light for durability:

It has handled the rough and tumble of life so far.

Rate the light for weight:

Really lightweight. Other than for the fact it feels secure when on, you wouldn't know you're wearing it.

Rate the light for value:

Compared to other helmet-mounted lights of similar outputs, the Bilby is very good value. It's arguably more useful in a wider range of applications, too.

Tell us how the light performed overall when used for its designed purpose

I was pretty impressed with it. You couldn't use it as your sole front light – for legal reasons if nothing else – but it's a fantastic secondary option.

Tell us what you particularly liked about the light

Recharging and run-times are excellent, and lighting performance is impressive.

Tell us what you particularly disliked about the light

All those lighting options – I think it's too many.

How does the price compare to that of similar products in the market, including ones recently tested on

Exposure's very competent Link Daybright is £69.95 while the larger, heavier but more powerful Link Plus Daybright is £85. Or for £69.99 there's the Cateye Volt 400 Duplex, which features 400-lumen top power with a 3-hour run-time.

Did you enjoy using the light? Yes

Would you consider buying the light? Yes

Would you recommend the light to a friend? Yes

Use this box to explain your overall score

This is a typically Knog-ish take on the head torch, with a fun and comfortable silicone design, and a whole host of lighting options. But its crowning glories are probably the impressive 400-lumens max output, up to 105 hours of run-time and 4-hour recharging.

Overall rating: 9/10

About the tester

Age: 39  Height: 6'0  Weight: 16 stone

I usually ride: Islabikes Beinn 29  My best bike is: 25-year-old Dawes Galaxy

I've been riding for: Over 20 years  I ride: Most days  I would class myself as: Experienced

I regularly do the following types of riding: commuting, touring, sportives, general fitness riding, mtb, Leisure

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