2015 Lights Shootout

Gloworm is an Mtbr forum legend with the X2 model sitting in the sweet spot between the X1 and the XS. This year, the X2 raises its measured output from 1391 Lumens to 1545. Total weight and run time have stayed the same and the price dropped a bit to $255.

We rode the X2 on our local trail and love all the details of compactness and versatility. The light system comes in a tiny box that one can just keep in the bike bag all the time. The helmet mount and bar mount are included in the package, and the remote wired switch is just something you don't see these days. It frees up head unit real estate for critical cooling fins, and it protects the user's fingers from a potentially hot light head.

Test loop with the Gloworm X2. Camera is on a locked ISO setting and is set to Wide Angle mode.

This light is ideal on the bar with an X1 complementing it on the helmet. By itself, helmet mounting is ideal to cover all the switchbacks and tight turns with illumination. We even used the smaller Gloworm battery (not included) on the helmet so we could mount the battery on the back of the helmet for a 'backpackless' helmet light. That worked very well and run time was halved to 1:15 hours. Running it at mid power during climbs gave us more than enough light and enough run time.

So the Gloworm X2 wins again. It's not a huge improvement from last year, but it keeps marching on with a beautiful beam pattern, a well-conceived package and good value.

Beam Pattern Photo

We photographed the lights in the same location setting with the same camera settings. The photos were taken in the back yard that is approximately 25 yards long. These photos feature many objects and a distinct background to analyze detail and beam pattern. Compare all Beam Patterns here »

Gloworm X2 Backyard Beam Pattern

Integrating Sphere Measured Lumens

This light measured 1545 Lumens in an integrating sphere. Claimed Lumens by the manufacturer is 1500 Lumens. The Lumen-hour graph below shows how the light performs over the first three minutes of its battery cycle. Compare all Lumen Tests here »

Gloworm X2 Lumen Chart


  • Great beam pattern
  • 1545 measured Lumens on a light this size is incredible
  • Both mounts included and remote switch as well
  • Configurable light modes including overdrive 'bush' mode
  • Good packaging and materials
  • Lenses are interchangeable with flood, spot or combination
  • Amazing value and quality for the money
  • Light weight relative to its brightness
  • Great run time and available battery option to optimize for weight
  • Extremely compact packaging means it's very portable


  • Battery is too heavy to mount on the helmet
  • Programming requires practice (like the GoPro user interface)


  • Price: $255
  • Claimed Lumens: 1500 Lumens
  • Measured Lumens: 1545 Lumens
  • Lumens per $: 6.06 Lumens
  • Lumens per gram: 4.78 Lumens
  • Time on High: 2:30 Hours
  • Charge Time: 6:00 Hours
  • Mounted Weight: 323 grams
  • Category: High End

Overall Rating

4.5 Flamin' Chili Peppers
4.5 out of 5 Flamin' Chili Peppers

For more information visit www.glowormlites.co.nz.

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