Princeton Tec Swerve LED Light

Product Code
Princeton Tec
Current Stock

A combination of a diffused lens (on top) and a collimated focused lens (on bottom) creates a very bright 180-degree beam pattern than alternates between a wider beam and a narrow beam. Since the eye must juggle these two beams, it doesn't get a chance to relax, resulting in a very high level of visibility. The toggle switch makes it easy to turn on and off even with gloves on. Handle bar, seat post, seat stay and fork mounts are included, and the built-in clip allows for attachment to your helmet, pack or messenger bag. Rear light.


Lamp: 2 half watt maxbright LED

Burn time: 121 hours Batteries: 2 AAA batteries (alkaline)

Weight: 81g, 2.8 oz Attachments: handlebar, seat post, seat stay, fork, helmet and messenger bag

Control: toggle switch



Average rating: based on 16 reviews.

Ideal Light


Reviewed By: Sean Daly on 7/28/21

I have owned USB rechargeable taillights in the past and love the safety they have offered but my most recent one has had neverending charging and operating issues. I have opted for the Swerve LED light and am impressed with it's brightness. So far I have about 40 hours use on the batteries and still working well.If the batteries do last as advertised then this light will prove to be both excellent for safety as well as cost-effective compared to the USB ones - and most likely much more reliable

Too bright to stare at


Reviewed By: Todd Collart on 12/11/20

I purchased a USB charged flashing taillight, but the battery was so small that it required frequent recharging. I wanted a bright reliable light with lots of battery life. I opted for the Princeton Tec because I had one already and wanted to standardize my lighting system using rechargeable AAA batteries that will carry me though days of cycle touring and be readily rechargeable with 110 charger for four batteries. Prying the body halves apart is a challenge; a small flange on the two halves would be helpful.

The best rear light I've owned!


Reviewed By: Christopher on 2/27/20

Super bright and long lasting battery. Just put it through the washing machine in the pocket of my jacket and it still works flawlessly, so I guess it's really waterproof!

Great Visibility


Reviewed By: William Hall on 1/1/20

I have it attached to my seat on a homemade bracket so as to be visible above a rack bag I usually carry. It has the best visibility of any taillight I have seen, especially in fog and rain and is easy to switch on and off while riding along. Battery life is excellent. If there is anything negative to say it is that is is too easy for it to come apart and fall to the ground if bumped, but it has never come apart due to rough riding. I would prefer it to be held together with a screw rather than plastic snap latches. This is the second one of these lights I have purchased.

Love it!


Reviewed By: Michael Pieper on 6/6/19

This light is great! I probably have 50 hours on the original batteries and it is still going strong, but I do use it only in flash mode. I like the design as it concerns the on/off/flash switch because it is easy to manipulate. It is mounted rear facing on my seat tube, which on previous lights, was difficult to manipulate when riding. Yes, I often forget to switch it on before starting a ride.

Show More Reviews

Add Product Review