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Tau lightweight bike lights

Bright and very, very lightweight front and rear LED bike safety lights. USB rechargeable with a wide beam to help you be seen

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  • Front bike light -
    Front bike light
  • Rear bike light - Tau bike light
    Rear bike light
  • -
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Bright enough to blind you when you turn it on so you can be sure that other road users will also see you.

Tau+ front safety light offers 65 lumens of 270° ultra wide lighting with 10 m beam distance. 

Tau- rear safety light will shed out 20 lumens of 270° ultra wide lighting from the red COB LED strip

Tau is visible from up to 100 m and is water resistant so they will happily brighten your way even on the gloomiest of days and is impact resistant from 1 m.

Switch protection prevents any unwanted battery usage and battery capacity indicator will let you know when the juice is running low.

Only 22 g including the USB rechargeable battery and LED lights that never need replacing will keep you light and bright for years to come!

Key features
  • 3 Year Alpine Bond
  • Attaches with sturdy rubber band for quick fitting
  • Lightweight, only 22 g
  • 5 different lighting modes
  • Water resistant
  • 2 hrs charging time
More images
  • Tau front side -
  • Tau rear side -
  • Tau front charging -
  • Tau rear charging -
  • Tau front detail -
  • Tau rear detail -
  • Tau front mounted horizontall -
  • Tau front mounted vertical -
Vital stats
Tau+ (front)

Lumens: 65 L
Run time: 4 hrs
Beam distance: 10 m
Beam intensity: 25 cd

Lumens: 30 L
Run time: 8.5 hrs
Beam distance: 7 m
Beam intensity: 13 cd

Lumens: 10 L
Run time: 30 hrs
Beam distance: 4 m
Beam intensity: 5 cd

Flashing 6Hz & 3Hz:
Run time: 12 hrs


Battery: 3.7V 300mAh Li-polymer rechargeable

Tau- (rear)

Lumens: 20 L
Run time: 3 hrs (2.5 hours in colder temperatures)
Beam distance: 6 m

Lumens: 6 L
Run time: 16 hrs
Beam distance: N/A

Pulse flashing:
Run time: 15 hrs
Flashing 6Hz & 3Hz:
Run time: 18 hrs


Battery: 3.7V 300mAh Li-polymer rechargeable


70mm x 29mm x 18mm

Origin: China

?2 x rubber band included: Large fits Ø25-38mm handlebar/ seatpost Small fits Ø13-25mm handlebar/ seatpost


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Free UK Shipping on all orders

Free 2 day delivery to UK addresses is included in all orders so the price you see is the price you pay. Upgrade to next day at the checkout.

Free No hassle 123 Day Returns

Buy with confidence and if you are not happy, change your mind or want a swap for any reason then return it for free and we will exchange or refund no question. The price you see is the price you pay. Just return the kit as you receive it - in its original condition, unused, unworn, with original packaging and fit for resale.


We offer a range of finance options from 0% to 9.9% starting on orders over £500. Please give us a call on 01773 417007 to apply for finance. Our customer support heros will take your order and talk you through the quick and easy application process.

Alpine Bond

If one of our products does not meet your expectations upon delivery or, if it does not live up to the demands placed upon it, please return it within 3 years of purchase for repair, replacement or refund. If the problem is our fault then we will do this to your satisfaction if it’s your fault then we will help out the best we can.


9 Reviews


Used this product?

Write a review
Survived a 40 deg wash

Had a white one for getting on for a year. It's used as an additional/ forgot to put the proper bike light in the bag, light. It's bright, though not directional and the battery lasts me a week of 15-20 minute rides home. The band is still going strong after a year of use, and it survived the wash in a jacket pocket!

Peter Urwin

I purchased the rear light and I don't see why you would buy anything else. It's very lightweight, barely noticeable on the bike when turned off and does the job of getting you noticed when turned on.

Great kit!

These lights are really excellent. Very very bright if you want it and they charge with usb cable. Want to buy more for family.

Tau back light

Good kit had mine over a year and no problems used for commute and night rides on full you can't be missed . Have a front one on order . I have a few alpkit products all good solid stuff and I spread the word cos you go wrong with stuff

Tau Rear light

I've been trying for a while to find a light that would fit an aero seat post and not move about. This is it. The nice people at the Hathersage shop were so helpful and got one out the box to help me test out to see if it would work. It did brilliantly and for £14 you can't go wrong!

Tom B
Good Marker Lights

I first purchased one rear light to try, rapidly followed by another, then a front light. The rears in particular serve well as a stand alone light especially when you use a few of them. The front isnt really sufficient as a stand alone light - especially not a see where you are going light, but again perfect for additional markers and is better than most pound shop offerings. I find the battery life is more than acceptable and in the summer far exceeds the estimates on the site. I am always skeptical of these type of lights that fit on with an elastic band, but so far so good and unusually the silicone is showing little sign of breaking down which has been an issue in the past with similar products.

Must be removed from bike to be charges - Not sure how the silicone bands will cope with this over time.
Charging port seal is poor - but no issues yet.
Low battery warning is too short and easily missed.
Excessive packing.

Light, tough and bright enough

Purchased as a lid light and mounts perfectly on the back of a Bell Zephyr without adding excessive weight. Unit is nicely made with decent quality materials that don’t feel brittle and the one-piece rubber pad/USB cover is clever, though the seal could be tighter on the USB port. The switch is easy to find and operate with gloves on too. Run time is good and I get 2-3 two hour rides out of it before needing to charge. Does exactly what I needed it to for a decent price, with back up from a UK retailer.

Light lights!

Not as bright as I had hoped, cheaper Aldi COBs are much brighter but these are very lightweight and small. Tau will stay lit for longer too, up to 3x as long. Best suited to extended riding in bad light and at night rather than being seen in the day. Would like to see a full power flashing option as that would make them almost as bright what I use currently with less weight and bulk. Charge quite quickly with supplied lead which fits nicely. Well made, as I now expect from AK.

Gary MacLean
Bright but poor run time

Bought four of the Tau rear lights for commuting. I run two on high on my seatpost and they're certainly nice and bright. Pulse mode is also good.
But the run time is very disappointing. I run these on high for 45 minutes each way on my commute and they don't last the whole way. So the claimed run time of 3 hours is nowhere near accurate. I wouldn't expect to get three hours but I also wouldn't expect half that to be acceptable.
I've been in touch with Alpkit to advise them and they offered a refund which is fair enough. However I've kept the light and advised them that the run time on the description really should be updated.

So great lights, light and bright and easy ti fit but runtime is only half of the claimed time.


4.5 / 5 Stars

Tau Makes Top 6

We’ve worked through a ton of rear lights to find our favourite six


BikeRadar November 2017 -