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Varia UT800 Smart Headlight

3.8333333333333335 out of 5 stars
6 Reviews

Style & Size:


Smartly adjusts to lighting outside.

Pair the Varia UT800 Smart Headlight with a Garmin Edge head unit for automatic adjustments to the ambient lighting outside, projecting the brightest beam on the darkest of nights and lowering its beam to save battery life at brighter dawn and dusk hours. Not only does it adjust its beam intensity to the lighting outside, but it also matches the light beam to your current speed and ride profile to save battery life at lower speeds with a lower beam and project more light when it's needed at higher velocities.

Five different lighting modes give you a wide array of beams for numerous ride types, meaning the Varia UT800 is great for daily commutes, long-distance road rides, and fast-paced trail rides after dark. Two different packages give you a bar/stem mount for road rides or a helmet-based mount for trail riding after dark. The rechargeable battery delivers approximately 1.5 hours of power at full blast of 800 lumens, lasting six hours on its lower setting for better battery life.


  • 800-lumen headlight smartly adjusts to ambient lighting
  • Adjusts to lighting outside with Garmin Edge computers
  • Cree LED projects a beam with 270 degrees of visibility
  • Five settings: high, medium, low, day flash, night flash
  • Trail package mounts to helmet for mountain biking
  • Road package mounts to bar and stem for road cycling
  • Meets IPX-7 waterproofing standards (fully submersible)
  • Rechargeable battery lasts 1.5 hours on highest setting
  • Item #GRM008Y
Cree LED
Power Source
rechargeable battery
Batteries Included
yes, rechargeable battery
high, medium, low, day flash, night flash
[highest setting] 800 lumens
Burn Time
[high] 1.5 hours, [medium] 3 hours, [low] 6 hours, [day flash] 25 hours, [night flash] 6 hours
[Urban Edition] handlebars and stem, [Trail Edition] helmet
yes, meets IPX-7 standards (fully submersible)
[Urban Edition] Varia UT800 Smart Headlight, charging cable, quarter turn to friction mount, [Trail Edition] Varia UT800 Smart Headlight, charging cable, helmet mount
[L x W x H] 3.8 x 1.3 x 1.2in
Claimed Weight
4.6oz (130g)
Manufacturer Warranty
1 year

Overall Rating

4 based on 6 ratings

Review Summary

1 Stars - 0 reviews
2 Stars - 2 reviews
3 Stars - 0 reviews
4 Stars - 1 reviews
5 Stars - 3 reviews

Fits True To Size

Screen reader users: the following list provides a visual scale to illustrate the product fit. Please refer to the heading above for the fit type in text.
Runs smallTrue to sizeRuns large

What do you think about this product?


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5 out of 5 stars

August 7, 2023

Working As Advertised

I've put it through the wringer

So far this is the best headlight I’ve used on my road bike, The night flash mode is especially helpful, as I ride mostly in the early pre-dawn. In combination with my Varia taillight and Garmin 1030, this light is a keeper.

Bob F

Originally reviewed on

2 out of 5 stars

September 1, 2021

Great function. Limited life.

I've used it once or twice and have initial impressions

Smart features and function with Garmin devices works great. Easy to setup and managed through my 530 Edge, and I light the integrated mount feature. However, this isn't the light for you if you're planning to put in extended hours on the bike in the early morning or late evening. The light has died on the two ~30 mile morning rides I've used it, leaving me with little to no visibility. Unfortunately returning for a non-Garmin integrated light.

Sterling H
5 out of 5 stars

April 16, 2021

Awesome LED light

Been using over a month now and no issues. battery life is great. I have it on the auto setting and it works like a champ. recommend it for sure!!!

Marcel V

Originally reviewed on

4 out of 5 stars

January 30, 2021

Great Light for My Needs

I've put it through the wringer

My weekday training rides are done pre-dawn most days, so I need a good light. I've used Nite-Rider and Light & Motion over the years happily. Then I bought a Cannondale SystemSix, with bespoke aero bars. There is no place to mount a light except the bottom of the computer bracket. So I ordered the UT800. It twists on and off in just a second, never shifts or slips, and can easily be moved to our tandem. It provides plenty of light to see and be seen. Running it one step below full power I get 2-3 hours of steady use or in blink mode during the day I get more. So why not 5 stars? I tried it in paired mode with my 520 twice, then unpaired it. At 15 mph it switches to full brightness, which gobbles up battery life. Then the second day I had it paired it decided it only wanted to blink. It didn't care what I wanted. So I unpaired it and went back to manual mode, which works great. The only problem is that there is no way to know how much battery life is left, so I just charge it after every couple of rides and don't worry about it.

user image

Originally reviewed on

2 out of 5 stars

December 10, 2020

Garmin Varia UT 800 first impression

I've used it once or twice and have initial impressions

Even though I read the reviews I decided to buy this light. Mostly for winter riding or riding in places like the Blue Ridge Parkway that have tunnels that have no lighting. Well the reviews that state "Short Battery Life" are true. I used it 22 miles on a Saturday...and then on the next ride... at 15 miles... I received a Low Battery warning. ALREADY! I was running it connected to my 520 plus so it could do it`s thing. It`s lighting capabilities are impressive... But if it is only good for maybe a 50 mile ride... this light is worthless....!

Terry R

Originally reviewed on

5 out of 5 stars

November 5, 2020

Perfect Light

I've used it several times

I own a garmin computer and this light syncs with it so it knows how fast I'm going and light brightness changes with the speed. If I stop it also stops working until I move again. I like the safety aspect of having 800 lumens let drivers know I'm coming specially during the day. Since I bought the first light I have purchased 3 more for family members. Very pleased with it.

Federico A

Originally reviewed on