The Gemini Xera is cool. Although it looks like it has Magicshine roots, Chris Lai and his friendly Canadian crew have worked hard to innovate and spec some good lights in the Gemini line. The Xera has a nice, tiny light head and it puts out a good amount of light. It's ideal for the helmet use with a Duo or Olympia on the bar.

Specifications:
  • Price: $200
  • Claimed Lumens: 850 Lumens
  • Measured Lumens: 696 Lumens
  • Measured MTBR Lux: 72 Lux
  • Light Head Weight: 56 grams
  • Installed Weight: 207 grams
  • Run Time: 2 Hours, optional 4 hour battery is available for $30
  • Category: High End


2013 Gemini Line Up


Strengths:
  • Excellent construction
  • Clean beam pattern
  • Diminutive light head only weighs 56 grams so it makes a great helmet light
  • Good value light
  • Flexibility with battery options
Weaknesses:
  • 696 measured lumens is lower than 850 claimed
  • Beam pattern is a little narrow
  • Green switch light is always on
Mounting:

This is the standard rubber strap style a few different sized bands included. Helmet mount comes with pipe attachement that can be mounted near the front of the helmet to mate with the rubber strap. This can be aimed left to right.

MTBR Light Meter Measurements: Compare all lights here.

This light measured 72 Lux on our ambient light measurement facility.

Integrating Sphere Measured Lumens: Compare all lights here.

696 measured Lumens. Claimed Lumens by the manufacturer is 850 Lumens. The Lumen-hour graph below shows how the light performs over the first three minutes of its battery cycle.



Backyard Beam Pattern Photo: Compare all lights here.



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.

Tunnel Beam Pattern Photo: Compare all lights here.



The location is useful since it has walls and a ceiling that can display a bike light beam pattern. The walls have a lot of graffiti on them and actually show detail when they are lit up by a light with a wide angle. Cones and targets are set up with the far target set up at 80 yards.


Related Links
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2013 Mtbr Lux measurements »
2013 Mtbr Lumen Tests »
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