Head-to-head · Best Bike Lights

Garmin Varia RTL515 vs NiteRider Swift 500

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

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The short answer

Garmin Varia RTL515 comes out ahead by a narrow margin (4.3 vs 4.1). Garmin Varia RTL515 is best for: Road riders who want a rear light that also warns of overtaking traffic on a paired head unit, watch or phone. Read the strengths below before deciding.

Higher ratedRanked #1 in Best Bike Lights

Garmin Varia RTL515

4.3

2 sources$199.99as of Oct 11

The Garmin Varia RTL515 combines a rear light with a radar that warns of traffic approaching from behind. Road.cc found the radar alert reliable and the light very good, and Cycling Weekly came away impressed by how early it flags vehicles. Garmin quotes a detection distance of 140 metres, and the light changes its flash pattern when something approaches. Both outlets call it expensive, Cycling Weekly notes it gives only one alert for vehicles in convoy and does not spot every approaching vehicle, and road.cc points out that it charges over Micro USB.

Strengths

— Radar alerts the rider to overtaking traffic before it can be seen or heard, per road.cc
— Day flash is rated at 65 lumens with a claimed 16 hours, which road.cc found about right
— Light changes its flash pattern when a vehicle approaches

Watch-outs

— Expensive, according to both road.cc and Cycling Weekly
— Cycling Weekly: only one alert for vehicles in convoy, and it does not spot all approaching vehicles
— Charges via Micro USB rather than USB-C

$199.99 · Buy at garmin.com Full review →

Ranked #3 in Best Bike Lights

NiteRider Swift 500

4.1

2 sources$34.99as of Oct 11

Bikeradar found that the NiteRider Swift 500 delivers a focused 500-lumen beam ideal for urban visibility but suffers from a narrow spread that limits peripheral vision on busy roads. The integrated rubber strap simplifies mounting for gloved commuters, yet the high-output mode lasts only one hour and 30 minutes, restricting its utility for extended evening rides. Blog.plip.com documented that internal battery replacement is difficult due to aggressive adhesive and soldered connections, complicating long-term maintenance. This light suits short city commutes where being seen matters most, but riders needing wide beam spill or all-night runtime should look elsewhere.

Strengths

— Integrated rubber strap eliminates risk of losing a separate mount, appealing to commuters in gloves
— IP64 rating ensures robustness against daily use and heavy downpours
— Micro-USB charging completes a full cycle in approximately two hours

Watch-outs

— Beam spread is narrow with insufficient side spill for peripheral vision on busy roads
— Run time on the highest 500-lumen setting was only 1 hour 30 minutes in BikeRadar's test

$34.99 · Buy at niterider.com Full review →

How they stack up

Garmin Varia RTL515

The Garmin Varia RTL515 peaks at 65 lumens in day flash, below the Knog Blinder Link's 100-lumen maximum, but adds radar alerts the Knog does not have. It charges over Micro USB, while the Knog Blinder Link uses USB-C.

NiteRider Swift 500

The NiteRider Swift 500 is a 500-lumen front light, against 1,400 lumens for the Lezyne Macro Drive 1400+. It carries an IP64 rating where the Lezyne is IPX7, and it charges over micro USB while the Lezyne uses USB-C. It costs less than the Lezyne.

Specs side-by-side

Spec	Garmin Varia RTL515	NiteRider Swift 500
Lumens	65 (day flash)	500
Light Modes	4: solid 20 lumens, peloton 8 lumens, night flash 29 lumens, day flash 65 lumens	5 modes with run times
Battery Life	6 hours solid, 8 hours peloton, 6 hours night flash, 16 hours day flash (claimed)	Up to 32 hours depending on mode
Radar Range	140 metres (claimed)	—
Connectivity	ANT+, Bluetooth	—
Charging Interface	Micro USB	micro USB
Mounting Type	Seatpost, quarter-turn mount	Handlebar strap mount
Water Resistance	—	IP64
Weight	—	2.89 oz
Material	—	Dupont Fiberglass reinforced nylon

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