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Supernova E3 Tail Light 2 dynamo rear light



Excellent little rear light that's the perfect companion to Supernova's E3 front beams

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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Supernova's E3 tail light 2 is designed to be used with their front-facing dynamo lights and it's a brilliant bit of kit in every sense. It's tiny, powerful, well-designed and beautifully made.

Weighing in at just 15g the tail light 2 is effectively just three LEDs and an alloy mount. There's no standlight in there, but if you pair it up with a Supernova E3 front light the tail light will run off that when you stop. Supernova say it'll stay on for four minutes, in reality it's double that.

There are two versions of this light, the one we have (that attaches via two bolts to a rack plate) and a seatpost-mountable one with a rubber O-ring. Since the seatpost one is deisgned to be mounted vertically they're slightly different in design but both have a good range of visibility and are very bright. The horizontal unit has two outer LEDs with a sort of reverse-conical lens that disperses the light, and there are machined grooves in either side so that you can see it well from the side. On top of that, the LED lenses extend out of the alloy body for even better visibility. The middle LED is a standard domed shape and brighter than the other two, and there's a handy groove cut into the top so it's easy to check the light is on when you look over your shoulder.

In use with an E3 Pro 2 front light and an SP hub dynamo, and it's a fit-and-forget joy. I mounted it to a Tortec Velocity rack (I had to drill and tap some holes in it as it doesn't have a standard rack plate) and that's been the sum total of effort. No batteries, no worrying about whether it's on, no worrying about being seen. It's as bright as a battery-powered LED unit, tiny, neat and good-looking. All-round visibility is excellent.

Any problems with it? Not really. It's expensive, and ideally you'll already have an E3 front light which isn't cheap either. But you're getting a quality item here, no doubt about it. Think of it as an investment.

There's been some talk on light reviews in the past as to whether a small light is inherently less safe because drivers find it harder to work out how far away you are. My take on that would be that if you're pinning your hopes of safety on the ability of a driver to succesfully triangulate distance from 100m away based on something that's at best 10cm across, your prospects aren't good.

I'd rather rely on a nice bright light that'll get you seen. This is that. On an overnight ride or on really busy roads I'd be tempted to supplement it with a flasher, but it's plenty good enough for daily duties and should last pretty much for ever.


Excellent little rear light that's the perfect companion to Supernova's E3 front beams

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Make and model: Supernova E3 Tail Light 2 dynamo rear light

Size tested: grey

Tell us what the product 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?

For many years it was not possible to build a rear light with such small dimensions and such brightness that is road legal in Germany. The dazzling bright light of these precious gems guided by the clever Twin Beam Technology provides the best possible safety. The new E3 Tail Light 2 is a typical Supernova product that is expanding the technical limits while having a functional, puristic design.

The stand light electronics of the puristic rear light has been neatly integrated into the front light. This innovation makes the extremely small design possible.The CNC-machined rear light only weighs 12 g and is 100% waterproof. It is also one of the brightest rear lights that is road legal in Germany. The new side illumination of the lighting system further increases traffic safety.

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


Light colour red

Stand light 4 min *

Housing colours 8 colours

Illuminant 5 mm custom made LEDs

Length x width x depth 11 x 30 x 15 mm

Material 6061 Aluminium

Weight 12 g

Installation 50 mm standard

Rate the product for quality of construction:
Rate the product for performance:
Rate the product for durability:
Rate the product for weight, if applicable:
Rate the product for value:

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

Pretty much perfectly.

Tell us what you particularly liked about the product

Size, performance.

Tell us what you particularly disliked about the product

Pricey, especially considering you've already bought a front light.

Did you enjoy using the product? Yes.

Would you consider buying the product? Yes.

Would you recommend the product to a friend? Yes.

Overall rating: 9/10

About the tester

Age: 41  Height: 190cm  Weight: 102kg

I usually ride: whatever I'm testing...  My best bike is: Genesis Equilibrium 853

I've been riding for: 10-20 years  I ride: Every day  I would class myself as: Experienced

I regularly do the following types of riding: commuting, club rides, sportives, general fitness riding, fixed/singlespeed, mtb, Mountain Bike Bog Snorkelling, track


Dave is a founding father of, having previously worked on Cycling Plus and What Mountain Bike magazines back in the day. He also writes about e-bikes for our sister publication ebiketips. He's won three mountain bike bog snorkelling World Championships, and races at the back of the third cats.

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wunnspeed | 9 years ago

I've been running Supernova lights for quite a few years now (E3 Triple non-StVo version) with a Supernova Dyno hub and an Airstream headlamp for night racing and bikepacking and I have to say, I LOVE their products and the service, on the rare occasion it's needed, is fantastic!

Darkerside | 9 years ago

It is a weird choice by Supernova to only make their lights compatible with each other.

Try the B&M toplight or Philips SafeRide ranges bobinski. As bright as the Supernova*, but bigger lights and with built-in reflectors.

*I'm comparing with the first iteration of the taillight I had. This one might be brighter...

bobinski | 9 years ago

Such a shame this light is only compatible with its makers lights.

Can you please please please review some other rear dynamo driven lights?The B&M seculla seems to be about the next best option for dynamo users and has no compatitibilty issues and so is worthy of a comparative review.


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