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Cycling · 37 products

Best Bike Lights Under £100 UK

We track 37 bike lights under £100 on Amazon UK, priced from £5.63 to £66.21. Half of them sit at or below £16.80. 22 brands are represented, led by Abus with 9 listings. The cheapest is the ABUS Helmet Light for Smiley 3.0 and Skurb Kid, with Battery at £5.63, the dearest the ABUS U-lock Granit Plus 640/135HB150 - Extra light bike lock with round shackle - security level 12 - Black/Red at £66.21. That is 37 of the 42 bike lights we list in total. Ranking is by verified rating and review volume — never by commission.

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Prices and availability are accurate as of the date shown and may change. Always check the current price on Amazon UK before buying.

As an Amazon Associate we earn from qualifying purchases.

Why these picks

  • Ordering is mechanical: customer rating first, then review count, then a stable tie-break. Commission is not an input, and no listing can pay for a position.
  • 0 of the 37 listings carry a customer rating. Unrated listings are not hidden — they sort to the bottom, where you can still see them.
  • No brand quota is applied. Abus holds 9 of the 37 places because that is what the catalogue contains, not because it was favoured.
  • Prices and availability were last read from Amazon UK on 2026-11-01; 28 of the 37 were in stock at that point. Always check the live page before buying.
  • Match the front light's beam shape and output to where you actually ride — a be-seen light for lit streets is a different product to a see-by light for unlit paths, and the wrong one leaves you either under-lit or wasting battery.
  • Check the mounting bracket is secure and quick to remove without tools, since a light left on an unattended bike is an easy target and one that's fiddly to remove often just stays on and gets stolen or run flat.
  • Look at claimed run time on the modes you'd actually use, not just the headline maximum figure, since the brightest setting is usually the shortest-lasting one.
  • USB-rechargeable lights avoid the ongoing cost and waste of disposable batteries, but check the charging port is covered or sealed if the light will be used in wet weather.

Buying guide

What to look for

Lumens measure output, not usefulness

Lumen count is a measure of total light output, but two lights with the same lumen figure can feel very different in use depending on the beam pattern — a tightly focused beam throws further, a wide beam lights more of the road immediately around you. A higher number is not automatically the better light for your riding.

Front lights: be-seen versus see-by

A front light for riding on a lit street mainly needs to make you visible to other road users. A front light for an unlit path or trail needs to actually illuminate the ground ahead, which takes considerably more output and a beam shaped to throw light forward rather than just outward.

Rear lights and flash patterns

A rear light's job is to be noticed from behind, which is why flashing and pulsing patterns are common — a moving pattern catches the eye faster than a steady beam in peripheral vision. Some riders prefer a steady mode alongside a flashing one so following drivers can judge distance and speed more easily.

Mounting and run time

How a light attaches matters as much as its output: a bracket that flexes or rattles loose on rough roads defeats a bright light, and a light that needs frequent removal to charge is more likely to be forgotten at home. Claimed run times are usually given per mode, and the brightest mode drains fastest.

Common mistakes

  • Buying a be-seen light and expecting it to light up an unlit trail, or the reverse — buying a heavy see-by light for short lit-street commutes where it's overkill.
  • Choosing the highest lumen figure without checking beam pattern, then finding the light throws poorly despite a high headline number.
  • Ignoring run time on the mode actually used day to day, and being caught out when the brightest setting drains in under an hour.
  • Fitting a light with a loose or flexing bracket, which can point the beam away from the road or fall off entirely on rough surfaces.

Standards to look for: The Road Vehicles Lighting Regulations 1989 set the actual legal requirement for lights and reflectors on a pedal cycle ridden during the hours of darkness — check the current text on legislation.gov.uk rather than relying on a listing's own 'road legal' claim., Some cycle lights are tested to BS 6102-3, the British Standard covering photometric and physical requirements for cycle lighting equipment — worth looking for on a listing, though its presence or absence doesn't by itself tell you whether a specific light meets the legal requirement above..

Frequently asked questions

How much do bike lights under £100 cost in the UK?
The 37 bike lights under £100 on this page run from £5.63 to £66.21, averaging £21.84. Half of them are listed at or below £16.80. Amazon UK prices move, so treat these as the figures at the last catalogue refresh rather than today's shelf price.
Which brands make bike lights under £100?
22 brands appear in this selection: Abus (9), Mohard (5), CIRYCASE (4), ACSO (1), Aiuo (1) and Bestlsy (1), plus 16 more. The number in brackets is how many listings each has here, not a ranking of the brands themselves.
How many bike lights are under £100?
37 of the 42 bike lights we list — about 88%. Everything outside that 88% is still on the main bike lights page; this page is a filtered view of it, not a separate catalogue.
How many lumens do I need for a bike light?
There's no single figure to recommend without knowing your route: a lit street mainly needs a be-seen light, while an unlit path needs considerably more output shaped to throw forward. Check how the light is marketed — be-seen or see-by — before comparing lumen numbers.
Do I legally need lights on my bike?
The Road Vehicles Lighting Regulations 1989 set the legal requirement for a pedal cycle ridden during the hours of darkness: a white front light, a red rear light and a red rear reflector. The regulations have been amended more than once since 1989, so check the current text on legislation.gov.uk rather than relying on a listing's own 'road legal' claim.
Should I use a flashing or steady front light?
Flashing modes are generally better for being noticed on a lit street; a steady beam is usually better where you need to actually see the road surface, since a flashing beam can make judging distance and terrain harder.

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