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Tail Light Field


Easily turn off and on your ANT+ tail light while riding.</p><p></p><p>With the Edge devices the tail light is always on or controlled automatically, but sometimes it would be handy to be able to turn it off manually (for example when we have riders behind us or to save battery when biking off road) and then back on when it is necessary (when back on the asphalt for example).</p><p>Even with the Varia RTL Radar Tail Light sometimes it is desirable to turn the rear light off, leaving the radar fully operational.</p>

What’s New

Version 1.7</p><p>- Added support for Edge 1040</p><p>Version 1.6</p><p>- Added support for Edge 1030 Plus</p><p>Version 1.5</p><p>- Added support for Edge 830, EdgeExplore and Edge 1030 Bontrager</p><p>Version 1.4</p><p>- Ever lost your rear light? The field now stores the status of the light in the activity .fit file and it's viewable on Garmin Connect. Three values are stored: 2 (light is on), 1 (light is off) and 0 (light is not present). In case you discover your light is lost, review the ride on Garmin Connect to determine the exact position it has been lost (consider the light will be 20/30 meters far from the point it has been registered as missing).</p>

Additional Information


This app requires access to:

  • Record additional information into activity files
  • Edge® 1000 Edge® 1000
  • Edge® 1030 Edge® 1030
  • Edge® 1030 Plus Edge® 1030 Plus
  • Edge® 1030, Bontrager Edge® 1030, Bontrager
  • Edge® 1040 Edge® 1040
  • Edge® 820 Edge® 820
  • Edge® 830 Edge® 830
  • Edge® Explore Edge® Explore
  • Edge® Explore 1000 Edge® Explore 1000
  • Edge® Explore 820 Edge® Explore 820
  • Venu® Venu®
Average Rating: (43 Ratings)

Lou Parry
September 2, 2022 | Version 1.7

I installed this app so that I could monitor the battery level of my Garmin Varia as a data field. (Having the ability to turn the light on and off is nice too!) The battery level icon is there, which is GREAT! But it is so small I can hardly see it. Is there a reason why the battery level icon in the app is so tiny? The Varia Radar unit does not have a very long battery life, so keeping tabs on it is pretty important. Would love it if the developer could update the app so that the battery level icon is larger. Great app in every other way!!!

Toni Tijeras
August 13, 2021 | Version 1.6

Only one detail. Can you add a tone when push field? it would be useful since sometimes the response (on / off) is slow, and thus know if it has been pressed.

August 24, 2020 | Version 1.6

The Tail light field is good for Garmin Edge 830 and RTL510. However when the tail light field is touched for on, light and filed is gone to off mode after 2 second on.

Developer Reply
August 25, 2020, camillo.vezzoli

Are you doing that during an activity or before starting it? Before the activity is started it's normal the light gets turned off.

Neal Uhlich
August 10, 2020 | Version 1.6

This data field appears to not work with firmware version 9.50 on a Edge 1030. Installs as a data field and acknowledges the light network but pressing the field causes the Varia to flash twice and that's it. It does show the battery status.

Steffen Bornemann
August 5, 2020 | Version 1.6

Great help for my varia 510! Would it be possible to add the current mode in the data field? like „Blink“ or „on 40%“?

Ruud Woudstra
July 9, 2020 | Version 1.6

Hi, I installed this app on my Edge 1030Plus, but I cannot find the app in my Edge. So I still cannot swith the lamp off and leave the Radar on. Can some help me to get it working on my Edge?? Thanks. Regards, Ruud.

July 6, 2020 | Version 1.6

Very helpful. I only use my RTL510 with the flashing function. And with this data field (Tail Light Field) I can switch off the blinking very simply whenever when it's not needed. E.g. on separate bike paths. Approaching vehicles are still displayed on the Edge 1030 Plus Diplay even without blinking.

July 3, 2020 | Version 1.6

Hello Camillo, great data field. Would it be possible to turn on the light if a car is detected automatically for maybe 10 seconds and after that, turn off again? Or isnt there any trigger point?

Developer Reply
July 8, 2020, camillo.vezzoli

It's something that could be developed but unfortunately it's not possible to support the Garmin 1000, so until mine doesn't break up and will force me to buy a newest device, I will not be able to develop it.

Joel Demay
June 18, 2020 | Version 1.5

Doesn't work, I'm using an Edge 830 unit with a Varia 510 Radar, and i get invariably a "no network" message, the radar feature is working fine, just the ability to control the light, or check the battery is simply missing.

Developer Reply
June 18, 2020, camillo.vezzoli

You need to connect not only the radar but also the radar light, otherwise your Garmin unit will not let you manage it. The 'no network' message is there to tell you that your light has not been properly set up in a light network.

Catalin Onel
June 17, 2020 | Version 1.5

Best app for Varia Lights. Thanks for developing!

Developer Reply
June 18, 2020, camillo.vezzoli


May 9, 2020 | Version 1.5

It works also with Cycliq Fly6 CE for light on/off/mode. Due to Garmin Edge (830) isn't possibile to not start Fly6 when starting recording or the Garmin itself, but then you can operate perfectly on light via data page and known its status.

May 2, 2020 | Version 1.5

Ciao ,sicuramente ho un problema io visto che non riesco a fare funzionare l'app in quando mi dice "No network" e nonostante sia andato sul manuale sia del varia e sia del mio edge 1030 e aver abilitato tutte le connessioni fatto le ricerche dei dispositivi e collegati il radar funziona se installo app VR Battery mi da lo stato della carica ma in tutti i modi non riesco ad attivare la funzione dell'app tail light Field ,ti chiedo aiuto per capire dove sicuramente sbaglio.ho visto anche tutorial e letto recensioni e non sono sicuramente l'unico con questo problema addirittura ad un utente davi aiuto dicendo di creare una rete light con il Device se no l'app non svolgeva la sua funzionario ciao ho provato ma nulla ti chiedo aiuto, grazie

Developer Reply
June 18, 2020, camillo.vezzoli

Devi connettere la luce in maniera separata, in modo che il garmin non veda solo il radar ma anche la luce.

Cyril D
November 27, 2019 | Version 1.5

Very useful. In a future upgrade, when the light is switched off on the Varia RTL, would it be possible to have the light switching automatically on when a vehicle is detected by the radar and then back to off ? Maximum visibility while saving battery. Thanks !

Fred Traanman
November 2, 2019 | Version 1.5

I am afraid it does not work on an Edge Explore (firmware 4.60). Edge Explore doesn't recognize an LightNetwork?

September 29, 2019 | Version 1.5

Excellent. Great addition to my Garmin Edge activity profile screens for use with the Varia Radar / Light (RTL510)

Adrian Gruner
August 1, 2019 | Version 1.5

Hi, very useful this app. Can I change the intensity of the light? It is very difficult for the ones that are behind me. Thanks.

Joaquín Barrera
May 30, 2019 | Version 1.4

Great data field! Really useful. It would be nice, that besides turn the light on/off, allow us to change the light mode... Continuous/pulse/blink. Great work though. Thank you!

Udo Waldenmaier
May 12, 2019 | Version 1.4

Works perfect in my edge 1030 and edge 1000. Love this data field.

May 1, 2019 | Version 1.4

In an Edge 1030 it works great, thank you very much. Is it possible to configure the field in flash mode?

Michal Janata
April 18, 2019 | Version 1.4

It's probably most useful data field I'm using. It would be perfect, if you can add tone on/off switch.

Ralf Bierschenk
February 27, 2019 | Version 1.4

Eine sehrgute App, das Varia RTL 500 läßt sich Perfekt damit ein und aus Schalten. Wünsche mir das gleiche für die Garmin Varia ut 800 .

January 1, 2019 | Version 1.4

Malgré dernière mise à jour de l'application, ne fonctionne toujours pas avec mon Garmin edge 820. Reste bloqué sur "no network". Version du firmware de mon Varia est 3.80

Developer Reply
April 18, 2019, camillo.vezzoli

The "no network" message means you have not set up a light network on the Garmin Edge. Please follow the Garmin manual to set it up and the field will start to work.

Toni Tijeras
September 10, 2018 | Version 1.3

La idea es muy buena! Pero a los pocos minutos salta un mensaje que pone algo así como "no network" y deja de funcionar en un Garmin 1030. Apago enciendo y vuelve a salir, pero al poco vuelve a pasar lo mismo, no encuentro cual es el problema

Felipe Serra
March 3, 2018 | Version 1.3

Hello any change to do the same for the front light, the override to start activity with lights off it's really perfect.

Antoine DeBono
November 14, 2017 | Version 1.3

Really love the simplicity and effectiveness of ths data field that works very well with the Edge 1030 and the rear Radar Varia RTL 500. Many thanks for the work that's gone into producing it. I have the Varia UT800 front light also. Is there any way of connecting the two, through the data field with a slight modification maybe so that the front light can switch on and off with the rear light simultaneously. That would be awesome.