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Blackburn DayBlazer 125 Rear



Simple functionality, great brightness, acceptable battery life and good build quality

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 Blackburn DayBlazer 125 is the big brother of the DayBlazer 65. It packs a bigger punch and longer burn times, with the same easy-fit mechanisms, at a small extra cost on the scales and a slightly bigger extra cost to your wallet.

  • Pros: Very bright, easy-fitting
  • Cons: Not as good value as the DayBlazer 65

In terms of how you fit and use the DayBlazer 125, I could simply refer you to my recent review of the smaller 65 lumen version. It features the same style rubberised mount that can mould to fit all kinds of seatposts and seatstays, which sits over a sprung clip for fitting to backpacks and the like.

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Secure and easy to use, it makes fast fitting and removal a doddle, while the single button you use to turn it on, off and cycle through modes is precisely the same too – a simple cycle-through system with no mode memory. Thanks to the added brightness, Blackburn has included a lower static light setting at 50 lumens (the equivalent of the only static setting in the 65 model), while topping out at an impressive 100 lumens in the high level.

The lithium-ion battery has near enough double capacity (3 hours versus 1:30 hours in the 50 lumen static settings), with a max output of 125 lumens in the 'high flash' mode. In this mode you also get 3 hours burn time, which I reckon is just enough for a decent-length winter ride in typical wintry gloom, while you can use the still-bright low setting for 6 hours if you're feeling particularly hardy.

Recharge times are up slightly too, but at just under three hours from empty to full, it's very convenient to just pop it into your powered USB bus while at work or at home and have a fully powered light the next time you use it.

The light is emitted from three LEDs in a longer array body, while the power button is positioned atop the unit rather than the middle. The extra size means weight has more than doubled, but at 87g it's still hardly an issue. The only potential thing to bear in mind (compared to the smaller unit, at least) is if you run your saddle height low and you want/need to mount it to the seatpost, you might not have enough exposed post to fit it on.

The 'TIR' lens over the LEDs points the light simultaneously backwards and downwards to compensate for the natural slant of mounting it on the seatstays, and there's improved side visibility too thanks simply to the greater brightness output.

Build quality is excellent, with a quality aluminium body this time out, a tidy-fitting USB cap and an IP67 waterproofing rating, which is more than enough to stand up to heavy rain or a five-minute deluge/half submersion in my shower without any concerns. Blackburn also backs it with its limited lifetime warranty too.

> Buyer's Guide: 15 of the best rear lights for cycling

Aside from the weight, the other downside is the added cost. At £44.99, it's a good £17 more than its smaller brother, which if I'm brutally honest does everything you really need from a bright rear light. That said, more power is always handy when you're on shorter urban journeys, while the extra battery life that the larger unit is capable of for longer rides is probably the most compelling reason to swallow the cost.

However, for just a fiver more you could have Lezyne's Strip Drive Pro 300, which can both out-power and out-last the DayBlazer 125 (in certain modes), while keeping much of the functionality.


Simple functionality, great brightness, acceptable battery life and good build quality

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Make and model: Blackburn DayBlazer 125 Rear

Size tested: Micro-USB rechargeable

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?

Blackburn says: "Take the lane with the confidence you're using the strongest tail light we've ever made. Featuring 3 focused LEDs, 270 degrees of visibility, and the 125 lumen BLITZ daytime running mode, the DAYBLAZER has all of your ride needs covered. Also, because of the narrow profile of the light and our unique mounting bracket, the DAYBLAZER 125 tail light can be mounted to just about anything you can think of from round or aero seatposts, to seat stays, to a rear rack, or your back pack."

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


- Charging cable included, no tools required

- Lithium-ion battery

- Waterproof to IP-67 standard

- TIR Lens

- LED Fuel Gauge/Charge Indicator

- Aluminum Construction

- 3 hour recharge time

- Runtime Solid: High 1.6hrs (120 lumen), Low 3 hrs (50 lumen)

- Runtime Flash/Strobe: 3hrs (125 lumen)/6 hrs (65 lumen)

- 78g

Rate the light for quality of construction:

The alloy body is solid, and everything looks very well made.

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

Very easy, and four modes is enough.

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

Super-easy to use and the recessed metal clip is handy too.

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

No ingress to report so far.

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

Not outstanding, but enough for one use-then-charge if you use it for a long weekend ride.

Rate the light for performance:

The LEDs and lens direction is effective, and the brightness is reassuring in busy or dark conditions.

Rate the light for durability:

Can't fault it thus far.

Rate the light for weight:

87g is a jump over the 65 version, but you still don't notice it in the real world.

Rate the light for value:

Lezyne's Strip Drive 150 is £32 rrp; for £5 more you can get Lezyne's Strip Drive Pro 300.

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

Very well.

Tell us what you particularly liked about the light

Very bright, easy-fitting.

Tell us what you particularly disliked about the light


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

Of the lights we've tested in the last year, the Lezyne Strip Drive Pro 300 costs a fiver more, while the Strip Drive 150 is £31.99.

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

If you're not convinced that the DayBlazer 65 will meet your brightness or battery life needs, the 125 version probably will; it's not as good value, though, so it loses a mark.

Overall rating: 7/10

About the tester

Age: 29  Height: 188cm  Weight: 80kg

I usually ride: Canyon Ultimate CF SL 9.0 SL (2016)  My best bike is:

I've been riding for: Under 5 years  I ride: Most days  I would class myself as: Expert

I regularly do the following types of riding: time trialling, club rides, sportives, general fitness riding

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