Cheap weekend breaks in the UK for under £100
16th May 2023
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We tested the most popular front bike lights and rear bike lights from Halfords, Lezyne, Knog, Moon, Cateye and more.
These were then dropped, soaked in water, and put through their paces on roads at night, to reveal those that shone out. Five were good enough to be named Which? Best Buys.
It's a legal requirement to have a white front light and red rear light on display when you're cycling at night. You will also be, and feel, a lot safer on the roads with a good front and rear bike light on your bike.
All of the bike lights we selected for testing are USB rechargeable. They're also all designed to illuminate the road in front of you, as well as be seen by other road users.
Only logged-in Which? members can view the electric shaver test results below.
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Bike lights | Cheapest price | Brightness | Durable? | Weight | Battery life on brightest setting | Where to buy |
---|---|---|---|---|---|---|
Excellent | Yes | |||||
Excellent | Yes | |||||
Excellent | Yes | |||||
Good | Yes | |||||
Good | Yes | |||||
Excellent | Yes | |||||
Excellent | Yes |
All the bike lights we tested are listed in alphabetical order below.
Only logged-in Which? members can view the best bike lights from our tests.
Join Which? to get instant access to our results and Best Buy recommendations below.
Only available at Amazon: £28.97
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Date tested: October 2022
Weight: 200g
Claimed battery life: Four hours
Only available at Amazon: £81.16
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Date tested: October 2020
Weight: 128g
Claimed battery life: 1 hour 30 minutes
Cheapest price: £39.99 at Amazon, also available at Halfords.
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Date tested: October 2020
Weight: 152g
Claimed battery life: 1 hour 30 minutes
Only available at Amazon: £29.99
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Date tested: October 2022
Weight: 193g
Claimed battery life: Three hours
Only available at Halfords: £44.99
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Date tested: October 2020
Weight: 213g
Claimed battery life: 1 hour 30 minutes
Only available at Halfords: £59.99 (out of stock)
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Date tested: October 2020
Weight: 225g
Claimed battery life: One hour
Only available at Tredz: £37.
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Date tested: October 2020
Weight: 123g
Claimed battery life: Two hours
Cheapest price: £46.95 available at Amazon, also available at Halfords, Probikekit
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Date tested: October 2022
Weight: 152g
Claimed battery life: 1 hour 30 minutes
Cheapest price: £34.49 available at Probikekit (out of stock), also available at Halfords.
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Date tested: October 2020
Weight: 96g
Claimed battery life: One hour
Cheapest price: £58.99 available at Merlin Cycles (out of stock), also available at Wiggle
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Date tested: October 2020
Weight: 232g
Claimed battery life: Two hours
Cheapest price: £15.99 at Rutland Cycling (out of stock), also available at Amazon
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Date tested: October 2020
Weight: 109g
Claimed battery life: Two hours
Only available at Amazon: £44.
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Date tested: October 2020
Weight: 212g
Claimed battery life: 2 hours 30 minutes
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We tested seven rear bike lights ranging in price from £10 to almost £40.
All of the lights were put through a bevvy of tests including durability, visibility, battery life and more. These are the seven rear bike lights we tested:
Log in now or join Which? to find out which are our Best Buy and Great Value picks.
We sent the most popular front bike lights and rear bike lights home with one of our researchers, who is also a keen cyclist, to put them through their paces in our specially designed bike lights test.
We ordered and paid for all of the lights we tested, just like you would.
We put each bike light through two key durability assessments:
How waterproof? We doused each light in a shower for five minutes, making sure each was subject to a steady stream of water droplets from every angle.
How robust? There's every chance you'll drop your bike light from time to time when wrestling with the elastic strap on a cold, dark evening. We dropped all of the front bike lights from the height of the handlebars, 10 times, onto a hard surface. Disappointingly, not all of the lights were able to pass this relatively simple test.
The brightness of a front bike light is more than just the stated lumen output on the packaging. We wanted to see how well this stated lumen output transfers to the road, and your surroundings, when you're riding.
To do this we strapped each of the lights to a bike (in turn), wait until it got dark, and head out to an unlit country lane.
After painstakingly ranking each light for how well it illuminates the road and its surroundings, it's interesting to note that lights with higher claimed lumen output aren't always better at lighting up the way while you're riding.
For the rear bike lights we conducted a visibility test at a variety of ranges and at as much as 180 degrees (to the side) of the light, as well as directly behind.
All of the lights we tested will last at least an hour on their brightest setting. And in some cases, they'll last days on their least bright setting.
For our battery test, we wanted to do something a little different and recreate a scenario that all cyclists will have faced. The dreaded flat battery test. For this we:
Most of the lights we tested will last more than two hours from a 10-minute charge. But we tested one that we found will only give you 20 minutes of riding time from this emergency charge, and another that was just under 40 minutes - it's worth knowing which these are if you have a long journey home.
We assessed each light on how easy it is to:
We weighed each light on the same set of digital kitchen scales.
The weights in our reviews are often a little higher than claimed by the manufacturer because we include the rubber or plastic strap that you use to attach the light to the bike, in our measurement.
We feel this is a more accurate weight, as you'll be carrying these attachments with you on the light when it isn't attached to your bike.
Front bike lights broadly break down into two categories, those that allow you to be seen, and those that will allow you to see the road.