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Knog Frog Strobe Front Light

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Product Description

The Knog Frog Strobe front light is the ideal secondary or backup bike light to your main system. With a silicone strap mount you can fix the Frog Strobe pretty much anywhere on your frame.

Visible at over 600m you can ride in confidence that you’ll be seen. At just 19g the Frog Strobe packs in impressive burn times of up to 80 hours. You get 4 brightness modes to play with including Strobe Pulse that creates a unique light source on the road that attracts attention.

Key Features

  • Visible up to 600m
  • Weighs just 19g
  • 8.5 lumen output
  • Burntime: 80 hrs Flashing / 50 hrs Steady
  • Hi powered surface mounted LED
  • Water resistant
  • Flexible silicone body
  • Integrated clipping feature
  • Dimensions: 80 x 35 x 42mM
  • Battery: 2 coin cell - CR2032
  • Colour: Red / White / Lime / Turquoise / Black / Indigo / Sky Blue / Rose / Grape / Titanium / Translucent / Gold

Occasionally, without notice, manufacturers change product design and/or specifications.

Knog Frog Strobe Front Light Reviews

Write your own review
Overall Rating:
4.5
out of 5
4.50
Build Quality
4.36
Performance
4.36
Value For Money
4.79

Customer Reviews (7)

4
Ideal as a kids scooter light or emergency spare
by Anonymous user on 25/12/2019

As per title, ideal as an extra light or an emergency spare but I wouldn't want it as my only light on a bike at night. We use it for our children's scooters and they love them in flashing mode! We have only had them a few weeks but Tey are build as the price would suggest and I'm not sure how long they may last, I hope to be pleasantly surprised.

As per title, ideal as an extra light or an emergency spare but I wouldn't want it as my only light on a bike at night. We use it for our children's scooters and they love them in flashing mode! We have only had them a few weeks but Tey are build as the price would suggest and I'm not sure how long they may last, I hope to be pleasantly surprised.

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3.5 out of 5
Build Quality: 2.5/5
Performance: 3.5/5
Value For Money: 4.5/5
5
Knog Frog front strobe light
by Gary P on 11/02/2016

Compact and easy to attach to bike. Great value too. Very pleased and highly recommended for use in the daytime. Not bright enough for nightime use.

Compact and easy to attach to bike. Great value too. Very pleased and highly recommended for use in the daytime. Not bright enough for nightime use.

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5 out of 5
Build Quality: 5/5
Performance: 5/5
Value For Money: 5/5
5
Nice little light
by Darren M on 15/01/2016

A small, neat little light that gives off enough light to make me more visible in poor light. Very good value

A small, neat little light that gives off enough light to make me more visible in poor light. Very good value

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4.7 out of 5
Build Quality: 5/5
Performance: 4/5
Value For Money: 5/5
4
Useful supplementary light
by Matthew D on 02/12/2015

Definitely not to be used as your main light but a useful addition to improve visibility. I use a Knogg Frog as a side light by putting it on my front forks facing outwards. Easy to get on and off.

Definitely not to be used as your main light but a useful addition to improve visibility. I use a Knogg Frog as a side light by putting it on my front forks facing outwards. Easy to get on and off.

Close review
4 out of 5
Build Quality: 4/5
Performance: 4/5
Value For Money: 4/5
5
Know Frog front light
by chris N on 11/11/2015

I have owned a few of the original know frog lights on vaious bikes and always been very pleased with them. They are small and light, and fit onto all handlebars and seat posts, rain doesn't seem to bother then and battery life is great too. This new version is even brighter and has four different flash modes. Cannot fault this little light.

I have owned a few of the original know frog lights on vaious bikes and always been very pleased with them. They are small and light, and fit onto all handlebars and seat posts, rain doesn't seem to bother then and battery life is great too. This new version is even brighter and has four different flash modes. Cannot fault this little light.

Close review
5 out of 5
Build Quality: 5/5
Performance: 5/5
Value For Money: 5/5
4
Small front light
by Ren S on 31/10/2015

I've had this before and it works ok, has types of settings. It's not the most powerful one

I've had this before and it works ok, has types of settings. It's not the most powerful one

Close review
4.3 out of 5
Build Quality: 4/5
Performance: 4/5
Value For Money: 5/5
5
Great light
by Anonymous user on 18/10/2015

Great light. Bright and great quality. One of my favourites for my helmets.

Great light. Bright and great quality. One of my favourites for my helmets.

Close review
5 out of 5
Build Quality: 5/5
Performance: 5/5
Value For Money: 5/5

Front Bike Lights Guide

 

Front Bike Lights Guide

If you ride lit streets and roads after dark you will need lights so you can be seen by other road users. If you ride roads and paths with no street lighting then a front light will be needed so you can see, not just be seen. The brightness of a light is measured in Lumen.

Mountain bikers who wish to ride trails in the dark will need two super-powerful front lights. Front lights almost always have a more powerful output than rear lights.

Lumen is the measure of the brightness of a light, though it is worth noting that not all brands measure in the same way. The lens has a massive effect on what we see lit ahead, some lights will have a widespread while others will be more of a spot.

We have a Lights Comparison Tool and Rear Lights Guide to help you choose the right bike light for your needs.


Lumen Ranges

If you commute on lit-up city streets, you will need lights to be seen by, rather than to see by. A front light with around 100 lumens should be enough for city commuting, over 400 Lumen will be best if you ride fast or you live in a darker area. Add lumen to your front light requirements up to around 800 for a totally dark cycle path.

For comparison, the full moon on a clear night is about 1 lumen, a smartphone's backlight is around 20, and a single standard car headlight is 1200 lumens.

Road cyclists on a poorly lit road

The more lights you have, the more visible you will be to traffic so ideally, you should have more than one light with one on flash mode so you are seen clearly at junctions and crossings by other road users. Flashing lights are much easier to see by others especially when it is raining.


Side Visibility / Beam Spread

Bike lights will often mention having side visibility that adds safety to the light, often more common with rear lights the beam is designed in a way that spreads light out to the sides, manufacturers might give this in degrees, for example, 120° visibility.

The beam pattern of a light can be different, some are more like a spotlight, while others offer a widespread, some even give a combination of the two.  

Narrow-Wide Beam Pattern Comparison

Use our Light Comparison Tool to see the differences in a real-world situation.


Runtime Ranges

Modern low output LED lights last a very long time depending on the mode selected. And entry-level light could have a run time between 1-20 hours depending on mode. The flash mode of a light will give the longest run time, and this is perfect for a busy urban environment where being seen is more important than seeing.

Mid-range lights can last up to 80 hours, more than enough for a commute, and reassuring when you forget to charge or cannot find a USB lead at work.

A front light mounted to a road bike, shining brightly

High-end lights that are larger with hi-tech batteries and bulbs can give thousands of lumen in power for up to 36 hours, these units do cost considerably more, but for riding offroad, or away from street lights the performance is incredible. 

To compare popular lights we have made a Light Comparison Tool where we took a range of lights to a very dark cycle path to show the differences.


Commuter/Road Lights

What to look for

If you commute on lit-up city streets, you will need lights to be seen by, rather than to see by. A front light with around 100 lumens should be enough for city commuting, over 400 Lumen will be best if you ride fast or you live in a darker area. Add lumen to your front light requirements up to around 800 for a totally dark cycle path.

Road cyclist with a bright front light

The more lights you have, the more visible you will be to traffic so ideally, you should have more than one light with one on flash mode so you are seen clearly at junctions and crossings by other road users. Flashing lights are much easier to see by others especially when it is raining.


Off-road Lights

Ultimate illumination

If you're a mountain biker and want to venture onto the trails after dark, you won't have any street lighting to guide you. That's when super-powerful front lamps with rechargeable batteries come into their own. Lighter units have the battery built into the light body, while the longest lasting and most powerful lights have a separate battery unit attached to your bike, in a bottle cage mount, for instance.

A mountain biker using lights mounted to both the handlebars and their helmet

One light on the bars and one attached to the helmet work best. lights in this category tend to have thousands of Lumens. At this High-end the battery technology has vastly improved usage and charging time over cheaper lights. The mounts are designed to cope with the rigours of mountain biking, with lenses that optimise the magnification and spread for trail riding.


Batteries and charging

There are two main power sources for your lights: ordinary batteries such as AA which need replacing when they run out, or those with a rechargeable battery built in. Rechargeable lights used to be far more expensive, but there are now many cost-effective and compact units available which can recharge from your computer with a USB cable. 

This makes them a brilliant option for commuters, who can charge them at their office desk during the day.

A Knog light with an internal rechargeable battery that charges via USB

There are other ways to charge your lights. Dynamo hubs store charge from your rotating wheel. They do require a new wheel to be built but need no power source other than your own legs. Modern dynamo hubs have very minimal drag and are the perfect choice for long distance touring a bikepacking. There are even a few solar power lights for totally carbon neutral cycling!


Technology

The majority of modern front lights use Lithium-ion batteries that give long burn times for relatively short charge time. Most lights have different modes of power including a flash or strobe mode. Higher power modes will use more battery.

The lens has a large effect on the light, though there are variations most will give a spot with a wider but less bright halo around the centre.

Mountain biker using advanced Exposure lights on both helmets and handle bars

Most modern lights especially those designed for off-road use will have a water-resistant rating with an IP number. In brief the larger the number the better protected against water and dust the light will be.

Lights commonly use either clamps or straps/bands to attach. For off-road lighting clamps are common helping the light stay in place over rough terrain, often featuring a quick release system.

Delivery & Guarantee

UK Delivery Information

We are committed to offering fast and free delivery, whether you're ordering bikes, accessories or clothing. Our standard delivery service is FREE in the UK, regardless of the size and on all orders over £20.

Please note that bulky products and bikes shipped to outlying UK regions are excluded from free shipping.

Please note that Pre-Order dates can sometimes change due to updated stock information.

Click here for more UK and international delivery information.

Returns & Warranty

It's easy to return a product with our 365 day, hassle free returns. 

We will give you a full refund or exchange on any item that is returned to us unused/unfitted, in a resaleable condition and in its original packaging (where possible).

Please note: For hygiene reasons, we cannot accept returns of facemasks, undershorts or underwear if the item has been removed/unsealed from its original packaging.

If your item develops a fault or arrives damaged, please contact us first so we can resolve the issue for you as quickly as possible.

For more information please visit our Returns & Warranty page.