Looking for the minimalist, weight-weenie approved mountain bike light for night riding? The Gloworm X2 packs all the features of the larger XSV we reviewed recently, and makes their smaller and lighter. The X2’s compact package still pumps out plenty of light, lets you customize the output and beam pattern, and even choose the battery size. Here’s why it’s worth a look…
One of the coolest things about this brand is the ability to customize output, but it can be a little tricky. In this video, we show how to customize the Gloworm X2 (and XSV) lumen output, how to change the bulbs, and how to setup the Gloworm remote control buttons. Even if you already own the lights, this video is a handy tutorial on how to set everything up. Keep reading for still shots of the beam pattern comparisons, actual weights and the specs.
What’s in the box? How much does it weigh?
The Gloworm X2 comes with their 1700 lumen two-LED head unit that uses CREE “bulbs” behind the replaceable lens elements. There are two kits, the standard ($265 USD) and the adventure ($212 USD), the difference being which battery you want. The standard one is a 4-cell 6800mAh battery good for a claimed 3 hour run time (with general mixed settings use). The smaller adventure battery is a 2-cell 3400mAh with 1.5 hour run time.
Other bits are a GoPro-style helmet mount and clip, wall charger, 31.8mm handlebar clamp, extension cable, spare bolts and small parts, and the various lens elements:

The X2 comes with:
- 2x Spot lenses (96% light transmission, 17º angle)
- Flood lens (84%, 25º)
- Wide lens (87%, 40º)
The Flood is exclusive to the X2, where the XSV gets a honeycomb option with a bit different pattern. The X2’s lens elements are slightly smaller than the XSV and are not interchangeable.