Review: Lezyne Zecto Auto Tail Light

It's a good tail light and it turns itself on and off automatically

Lights Lights Shootout

2015 Lights Shootout

Lezyne Zecto

The Lezyne Zecto Auto dazzles with an entertaining array of flash modes. It’s got good rear visibility as well as side visibility and it has such a small form factor that you can just leave it mounted on your bike permanently.

It’s rechargeable and it delivers up to 2 hours on solid ‘high’ mode, so flashing mode is quite a bit longer than that. The switch and the charging port are neatly integrated at the top and bottom of the light.

But the best thing about the light is it has a ‘sleep’ mode that is awakened by movement and put to sleep by inactivity. Thus, it is an automatic light that turns itself on and off. This is a huge idea since many users forget to turn their light on or off, so they’re either compromising safety or battery life. But with a light that turns on and off by itself, we should be covered right?

In sleep mode, the light turns on at the slightest bit of movement. After 2 minutes of no motion, it will turn itself off. The only downside is it will drain a tiny bit of battery charge while in sleep mode.

This light has a front light sibling as well, so everything we’ve said about the tail light applies to a ‘to be seen’ front light version.

Video: Test with the Lezyne Zecto Auto Tail Light. Tail Light was shot from 20 yards away with a camera at fixed exposure. The light was pointed at the camera then turned to the side. Different flash modes were activated.

  • Price: $50
  • Claimed Lumens: 20 Lumens
  • Measured Lumens: 20 Lumens (in flash mode)
  • Lumens per $: 0.22 Lumens
  • Lumens per gram: 0.23 Lumens
  • Time on High: 2:10 Hours
  • Charge Time: 2:30 Hours
  • Mounted Weight: 47 grams
  • Category: Tail Light
Overall Rating

5 Stars 5 out of 5 Stars

It’s a great light that has good visibility in a very small package. The fact that it can automatically turn itself on and off makes it a sure winner.

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This article is part of Mtbr and RoadBikeReview’s 2015 Lights Shootout. To see all the bike lights tested CLICK HERE.

About the author: Francis Cebedo

The founder of mtbr and roadbikereview, Francis Cebedo believes that every cyclist has a lot to teach and a lot to learn. "Our websites are communal hubs for sharing cycling experiences, trading adventure stories, and passing along product information and opinions." Francis' favorite bike is the last bike he rode, whether it's a lugged commuter, ultralight carbon road steed, singlespeed or trail bike. Indeed, Francis loves cycling in all its forms and is happiest when infecting others with that same passion. This obsessive personality has also turned him into a bit of an addict when it comes to high quality coffee and IPAs.

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  • ken says:

    20 lumens? That is pretty much useless for road riding. How can you possibly give this light 5 stars?

  • jpre says:

    20 lumens is probably plenty to be seen. I question the 2 hour runtime. Seems like that might be unsafe for those who ride for around that amount of time or a bit more.

  • Francis Cebedo says:

    This is a bright light.

    One thing that we’ll explain better is red tail lights only measure 30% of their white light counterparts in an integrating sphere. Red is not as visible in white on the lumens scale. So it is a bit confusing.

  • Francis Cebedo says:

    2 hour run time is confusing as well. That’s on solid/high mode just to get a reference. Normal mode is ‘high flash’ mode and that is 7 hours of run time on this.

  • Ben says:

    I have these lights and the run times based on my use seems correct. Also, the red tail light emitting 20 lumens, you will be surprised is very bright. The brightness is as attention-getting as my 2 watt Hotshot Cygolite which I use both for night riding to be seen.

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