Review: Gloworm XS 2200 Lumen Bike Light

Lights Lights Shootout

The Gloworm XS is a high end light that a delivers a very wide but controlled beam pattern. The beam is rectangular to optimize for width and peripheral vision. The optics are configurable to make this the optimum bar light or helmet light.

The head unit weighs 110 grams but it delivers an incredibly bright and consistent light that measured in at 2230 Lumens.

The light has a wired remote switch that will keep your hands away from the head unit that can get hot. And it will bring the switch by your fingertips when the light is bar mounted. The light also includes a bar mount in addition to the helmet mount.

And finally, battery pack looks good with Panasonic cells and a fuel gauge on the pack. Run time is an excellent 2 hours at max output. Two packs are available, a 4-cell and a 2-cell one and we used the 4-cell on this test which takes 5 hours to charge.

Programability is one of the high points of the Gloworm design, as there is almost a limitless amount of light levels and options available. It is well-designed but any UI that doesn’t have displays or monitors requires a bit of practice to get used to.

Configurable optics is another high point of Gloworm as this light includes both wide and focused beam optics. This really expands the range of the light as the same light can be used for spread or throw. Or better yet, get two and configure the optics to be one of each.

  • Price: $370
  • Claimed Lumens: 2200 Lumens
  • Measured Lumens: 2230 Lumens
  • Measured MTBR Lux: 224 Lux
  • Lumens per $: 6.05 Lumens
  • Lumens per gram: 6.51 Lumens
  • Time on High: 2 Hours
  • Charge Time: 5 Hours
  • Mounted Weight: 344 grams
  • Category: High End
  • Great, very wide beam pattern
  • 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
  • Light weight relative to its brightness
  • Good run time and available battery option to optimize for weight
  • Extremely compact packaging means it’s very portable
  • Better than the claimed 2200 Lumens
  • Programming requires practice (like the GoPro user interface)

The light includes a helmet mount with a velcro strap and a center-mounted bar light with a rubber strap. A CNC’d quick release bar mount, normally $50 is included in the kit.

Mtbr Light Meter Measurements

This light measured 224 Lux on our ambient light measurement facility. The light output measurement is performed by placing a Lux light meter beside the light. Both are pointed at the ceiling (five feet above) of a dark room. This measurement uses the ambient light produced by the bike light.

Integrating Sphere Measured Lumens

This light measured 2230 Lumens in an integrating sphere. Claimed Lumens by the manufacturer is 2200 Lumens.

Compare all Lumen Tests here »
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 »

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Related Links
2014 Tunnel Beam Pattern Comparisons »
2014 Mtbr Lumen Tests »
2013 Bike Lights Shootout »
2012 Bike Lights Shootout »
Mtbr Lights Reviews »
Mtbr Lights Forum »

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About the author: Francis Cebedo

The founder of mtbr and roadbikereview, Francis Cebedo believes that every cyclist has a lot to teach and a lot to learn. "Our websites are communal hubs for sharing cycling experiences, trading adventure stories, and passing along product information and opinions." Francis' favorite bike is the last bike he rode, whether it's a dirt jumper, singlespeed, trail bike, lugged commuter or ultralight carbon road steed. Indeed, Francis loves cycling in all its forms and is happiest when infecting others with that same passion. Francis also believes that IPA will save America.

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  • EC_Rider says:

    i got my x1 and x2 from actionLED

  • Blackbean says:

    I just got my XS on the 10th (March). I did a road ride with it on the 11th. Wow! First light I’ve ever owned with enough spread and throw (configured with 3 spot lenses)! I own a X2 and this light is a huge improvement. I love the 2 modes and configurable outputs, the special modes and the remote. No other light I know off offers all this with the same great beam pattern, small size and cost.

  • BlackBean says:

    I’ve done about 6 rides with this light now. I am still getting blown away by how powerful it is. I rather go ride on the road than spin on the trainer because of this, even when it’s a bit colder or wet outside. After 4 years of buying a new light each year, I think I finally have found the light that I will keep for a few years.

    Eventually I would like this kind of power with a 2-cell battery mounted to the back of the helmet and 2.5 – 3 hours runtime at 70% (ultimately in cordless format, but that is still some ways off). I use 100% only on descents so maybe less than 15 minutes on a 2+ hour ride. Until LED’s have become significantly more efficient (maybe 150 lumens per watt?) and batteries are about 25% or more energy dense, I will stick with this light!

  • Tim S says:

    I’ve used my XS 2200 on a half dozen rides so far. This the fourth light in my collection, some of which are dead. Battery life seems to be as stated. Illumination is very good, although I may opt to change the lenses for mor periferal light. As a mechanical engineer, I’m not a fan of the cantilevered single screw mounting bracket. This design is too delicate for long term mountain biking in my opinion and prone to breaking especially if helmet mounted. I am using it on my bar with a de sent spot light on the helmet and its an account excellent combination. Overall I’d probably recommend this light to a friend, and would give it 4 out of five stars.

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