DON PEREGRINO B2 Rear Bike Light, 110 Lumens, 5 Red and Blue Modes

Riders who want a rear light for road biking or commuting may value a choice of colors and flash patterns, not just a steady red beam. The DON PEREGRINO B2 is a rechargeable tail light with five modes, a stated maximum output of 110 lumens, and mounts for either the saddle or seatpost.

Its red and blue settings give it a different approach from a basic red-only light. The trade-off to consider is that the listed runtime and water-resistance details are not fully consistent across the product information.

What matters most

The B2 uses 36 COB LEDs and offers steady and flashing red, steady and flashing blue, plus a red-and-blue strobe. That gives riders several ways to make the rear of the bike more noticeable, whether they prefer a steady setting for a familiar look or a flashing pattern for added attention. The stated beam angle is 180 degrees, and the product information gives visibility of up to 150 meters, those are manufacturer claims, not a guarantee of what other road users will see in every condition.

It charges by USB-C, with the listing stating about two hours to charge and a runtime of four to ten hours. Elsewhere, the product description says four hours of battery autonomy, so the published runtime is not consistent. Buyer feedback also varies: some report several hours of use, while others say the charge does not last an hour. If you prioritize predictable runtime for longer rides, that uncertainty is relevant to the decision.

Who it’s for

This light is suited to someone looking for a compact rear-facing light with multiple color and flash options, rather than a simple red-only model. It weighs 80 g and measures 3.15 inches long, 1.18 inches wide, and 1.57 inches high. The package includes two mounts, one for the saddle and one for the seatpost, so it offers placement flexibility without requiring a single mounting position. It suits you if you want a rechargeable light that can be removed from its mount when you leave the bike.

Buyer feedback often highlights brightness, the attention-catching red-and-blue patterns, and straightforward installation. Experiences with the mount are mixed, however: some find it easy to fit, while others say it does not stay securely in place. Reports about reliability are also divided, including comments about the light switching off unexpectedly. These are user impressions rather than guaranteed outcomes, but they make secure mounting and checking the light before a ride sensible considerations.

Getting the most from it

Choose the saddle or seatpost bracket based on where the light will be most visible from behind, then follow the supplied instruction to tighten the two screws before rotating the light into the under-saddle bracket. The quick-release setup is useful if you want to take the light with you for charging or when parking the bike. A practical use is selecting a steady setting for a familiar route and switching modes when you want a different rear-light pattern, the B2 is a tail light, not a front light for illuminating the road ahead.

The product is described as waterproof and listed as IPX5 in its title, but manufacturer information elsewhere specifies IPX4. Since those ratings conflict, the exact water-resistance level is unclear, avoid treating the listing as a definitive rating for severe wet-weather use.

Is it worth it?

The B2 makes sense if you want a USB-C rechargeable rear light with five red-and-blue modes and a choice of saddle or seatpost mounting. It may not suit you if dependable, clearly documented battery life or a consistently secure mount is essential, given the conflicting runtime details and mixed buyer feedback. For a straightforward rear light with flexible modes, its feature set is more varied than a basic steady-red approach, for a ride where runtime certainty matters most, a model with consistent battery-life information may be easier to assess.